Тема: Please Help Solve Physics Problem?

Physics Help. graphs;. The two example problems above illustrate how the. Describing Motion with Equations » Kinematic Equations and Problem-Solving.

This semester I started tutoring in the physics and math study center. I am the only “pure” physics tutor – the rest of the tutors are mathematicians or engineers who feel very comfortable with mathematics (justly so, they’re all quite awesome). Most of them shy away from physics problems, though, letting me – and a handful of other tutors – deal with the dreaded subject.

In general, physics seems to have this aura to it that scares people before they even start solving a problem. This begins with very basic physics, but continues with higher level material. The difference seems to be that only those who like physics – and find a good way of dealing with it – stick around to deal with the higher level stuff.

A set of instructional pages written in an easy-to-understand language and complemented by graphics and Check Your Understanding sections. An ideal starting location for those grasping for understanding or searching for answers.

This newest section of our site includes a rapidly growing collection of HTML5 interactive physics applications. Designed for tablets such as the iPad and for Chromebooks, this user-friendly section is filled with skill-building exercises, physics simulations, and game-like challenges.

If you''''re learning Physics you need to practice solving problems. Here are some sample problems for topics covered in a typical introductory Physics course. By randomizing the content every time any given problem is loaded, each link provides a virtually endless source of variations on each type of problem. You can keep practicing and checking your answer against the solution until you have the problem type down cold. For more intense practice you can make up minitests from your choice of problem types.

HELP HOME PAGE

The following resources are intended to assist in learing basic physics principles. Additional resources for physics students are available at The Physics Classroom Tutorial and the Multimedia Physics Studios.

A multitude of problems (37) involving the analysis and interpretation of position-time and velocity-time graphs. Each problem is accompanied by an answer and an explanation.

This semester I started tutoring in the physics and math study center. I am the only “pure” physics tutor – the rest of the tutors are mathematicians or engineers who feel very comfortable with mathematics (justly so, they’re all quite awesome). Most of them shy away from physics problems, though, letting me – and a handful of other tutors – deal with the dreaded subject.

In general, physics seems to have this aura to it that scares people before they even start solving a problem. This begins with very basic physics, but continues with higher level material. The difference seems to be that only those who like physics – and find a good way of dealing with it – stick around to deal with the higher level stuff.

A set of instructional pages written in an easy-to-understand language and complemented by graphics and Check Your Understanding sections. An ideal starting location for those grasping for understanding or searching for answers.

This newest section of our site includes a rapidly growing collection of HTML5 interactive physics applications. Designed for tablets such as the iPad and for Chromebooks, this user-friendly section is filled with skill-building exercises, physics simulations, and game-like challenges.

If you''re learning Physics you need to practice solving problems. Here are some sample problems for topics covered in a typical introductory Physics course. By randomizing the content every time any given problem is loaded, each link provides a virtually endless source of variations on each type of problem. You can keep practicing and checking your answer against the solution until you have the problem type down cold. For more intense practice you can make up minitests from your choice of problem types.

HELP HOME PAGE

The following resources are intended to assist in learing basic physics principles. Additional resources for physics students are available at The Physics Classroom Tutorial and the Multimedia Physics Studios.

A multitude of problems (37) involving the analysis and interpretation of position-time and velocity-time graphs. Each problem is accompanied by an answer and an explanation.

This semester I started tutoring in the physics and math study center. I am the only “pure” physics tutor – the rest of the tutors are mathematicians or engineers who feel very comfortable with mathematics (justly so, they’re all quite awesome). Most of them shy away from physics problems, though, letting me – and a handful of other tutors – deal with the dreaded subject.

In general, physics seems to have this aura to it that scares people before they even start solving a problem. This begins with very basic physics, but continues with higher level material. The difference seems to be that only those who like physics – and find a good way of dealing with it – stick around to deal with the higher level stuff.

A set of instructional pages written in an easy-to-understand language and complemented by graphics and Check Your Understanding sections. An ideal starting location for those grasping for understanding or searching for answers.

This newest section of our site includes a rapidly growing collection of HTML5 interactive physics applications. Designed for tablets such as the iPad and for Chromebooks, this user-friendly section is filled with skill-building exercises, physics simulations, and game-like challenges.

If you''''''''re learning Physics you need to practice solving problems. Here are some sample problems for topics covered in a typical introductory Physics course. By randomizing the content every time any given problem is loaded, each link provides a virtually endless source of variations on each type of problem. You can keep practicing and checking your answer against the solution until you have the problem type down cold. For more intense practice you can make up minitests from your choice of problem types.

HELP HOME PAGE

The following resources are intended to assist in learing basic physics principles. Additional resources for physics students are available at The Physics Classroom Tutorial and the Multimedia Physics Studios.

A multitude of problems (37) involving the analysis and interpretation of position-time and velocity-time graphs. Each problem is accompanied by an answer and an explanation.

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DC Physics Practice Problems. If you're learning Physics you need to practice solving problems. Here are some sample problems for topics covered in a typical.

This semester I started tutoring in the physics and math study center. I am the only “pure” physics tutor – the rest of the tutors are mathematicians or engineers who feel very comfortable with mathematics (justly so, they’re all quite awesome). Most of them shy away from physics problems, though, letting me – and a handful of other tutors – deal with the dreaded subject.

In general, physics seems to have this aura to it that scares people before they even start solving a problem. This begins with very basic physics, but continues with higher level material. The difference seems to be that only those who like physics – and find a good way of dealing with it – stick around to deal with the higher level stuff.

A set of instructional pages written in an easy-to-understand language and complemented by graphics and Check Your Understanding sections. An ideal starting location for those grasping for understanding or searching for answers.

This newest section of our site includes a rapidly growing collection of HTML5 interactive physics applications. Designed for tablets such as the iPad and for Chromebooks, this user-friendly section is filled with skill-building exercises, physics simulations, and game-like challenges.

If you're learning Physics you need to practice solving problems. Here are some sample problems for topics covered in a typical introductory Physics course. By randomizing the content every time any given problem is loaded, each link provides a virtually endless source of variations on each type of problem. You can keep practicing and checking your answer against the solution until you have the problem type down cold. For more intense practice you can make up minitests from your choice of problem types.

HELP HOME PAGE

Order paper here help solving physics problems

Physics Help. graphs;. The two example problems above illustrate how the. Describing Motion with Equations » Kinematic Equations and Problem-Solving.

The distance traveled is the total area under the curve. Find areas of each section (count the squares): R = ½*4*20 S = 3*20 T = ½*3*20 U = 0 V = ½*1*10 W = 4*5 Add them up to get 155 m

1.) a.) Solve a kinematic equation: x = xi + vi*t + 0.5*a*t^2 .. 0 = xi + 0*t + 0.5(-9.8)*t^2 .. 0 = xi + -4.9*t2 .. xi = 4.9*t^2 .. Plugin the value for t (4.7 s) .. xi = 4.9*(4.7)^2 ans.. xi > 108.241 m 1.) b.) Use a kinematic equation: v = vi + at .. v = 0 + (-9.8)*(4.7) .. v = -46.06 m/s ans.. |-46.06| = 46.06 m/s 2.) a.) Use a kinematic equation: You are moving at 20 m/s for 0.5 seconds, before you start applying the breaks. This is before you apply the breaks, so the acceleration is 0. t = 0.5 seconds, xi = 125 m,.. vi = -20 m/s, a = 0 m/s^2. Find x. x = xi + vi*t + 0.5*a*t^2. .. x = 125 - 20*(0.5) .. x = 125 - 10 ans.. x = 115 m. 2.) b.) Use a kinematic equation: You have to have a final velocity of 0. (v = 0 m/s). Your initial velocity is 20 m/s. (vi = -20 m/s). Your initial position is 115 m (xi = 115 m). Your final position is 0 m (x = 0 m). Find your acceleration. Use v^2 = vi^2 + 2*a*(x-xi) .. 0 = (-20)^2 + 2*a*(0-115) .. 0 = 400 - 230*a .. -400 = -230*a ans.. a = 1.73913043 m/s^2. 2.) c.) Use a kinematic equation: You have a final velocity of 0. (v = 0 m/s). Your initial velocity is 20 m/s. (vi = -20 m/s). Your acceleration is 1.73913043 m/s^2 (a = 1.73913043 m/s^2). v = vi + at. ..0 = -20 + 1.73913043*t ..20 = 1.73913043*t .. t = 20/1.73913043 ans.. t = 11.5 seconds after the braking has started. 3.) Use a kinematic equation: x = xi + vi*t - 0.5*g*t^2 .. 0 = 2 + (12)*t - 4.9*t^2 .. -4.9*t^2 + 12*t + 2 = 0 Use a quadratic equation.. (-12 ± sqrt(12^2 - 4*(-4.9)*(2)))/(2*-4.9) .. -0.156647 or 2.60563 seconds. ans. 2.60563 seconds (time cannot be negative). 4.) a.) Use a kinematic equation: v^2 = vi^2 - 2*g*(x-xi) .. v = sqrt(18^2 -19.6*(-13-0)) ans.. v = 24.0582626 m/s downward. 4.) b.) Use a kinematic equation: x = xi + vi*t - 0.5*g*t^2 .. -13 = 0 + 18*t - 4.9*t^2 .. 0 = -4.9*t^2 +18*t + 13 Use a quadratic equation.. (-18 ± sqrt(18^2 - 4*(-4.9)*(13)))/(2*-4.9) .. -0.618190 or 4.29166 seconds. ans.. 4.29166 seconds (time cannot be negative). 5.) a.) Use a kinematic equation: v = vi + a*t .. 4.6 = 0 + (1)*t .. t = 4.6 s .. x = xi + vi*t + 0.5*a*t^2 .. x = 0 + 0 + 0.5*1*(4.6)^2 ans.. x = 10.58 meters 6.) Use a kinematic equation for all three parts: x = xi + vi*t + 0.5*a*t^2 .. x = 0 + 0 + 2*(9)^2 .. x = 162 m. .. v = vi + a * t .. v = 0 + 4*9 .. v = 36 m/s .. x = xi + vi*t .. x = 162 + 36*5 So far, x = 342 m. Solve for the time it takes to slow down.. v = vi + at .. 0 = 36 + (-3)*t .. t = 12 s. .. x = xi + vi*t + 0.5*a*t^2 .. x = 342 + 36*(12) + 0.5*(-3)*(12)^2 ans.. 558 meters. 7.) Use a kinematic equation: x = xi + vi*t + 0.5*a*t^2 .. x = 2.2 + 1.6*(1.9) + 0 .. x = 5.24 m. Find the distance traveled after the wheel begins to stick.. 8.2 - 5.24 = 2.96 m. .. v^2 = vi^2 + 2*a*(x-xi) .. 0 = 1.6^2 + 2*a*(2.96) .. -2.56 = 5.92*a ans.. a = -0.432432432 m/s^2. 8.) a.) Stopping distance = 0.5*(initial velocity) + decelerating distance. For the 0.5 second reaction time there is no acceleration.. x = xi + vi*t .. x = 0 + 50*(0.5) .. x = 25 m .. Acceleration (solve the first problem): x = xi + vi*t for the 0.5 second reaction time. .. x = 0 + 30*0.5 .. x = 15 m (traveled 15 m without accelerating). .. 60 - 15 = 45 meters actually spent decelerating. .. v^2 = vi^2 + 2*a*(x-xi) .. 0 = (30)^2 + 2*a*(45) .. -900 = 90*a .. a = -10 m/s^2 Apply this to part a.. 25 m + (distance spent decelerating) = Final stopping distance .. v^2 = vi^2 + 2*a*(x-xi) .. 0 = 50^2 + 2*(-10)*(x-25) .. -2500 = -20*(x-25) .. 125 = x-25 ans.. x = 150 meters Hope this helps!