Net Work & Kinetic Energy Video Lessons

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Problem: A little red wagon with mass 7.10 kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of 3.60 m/s and then is pushed 4.1 m in the direction of the initial velocity by a force with a magnitude of 10.0 N. You may want to review (Pages 177 - 182). For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Using work and energy to calculate speed.Use the work-energy theorem to calculate the wagons final speed.Use this acceleration in the kinematic relationship vx2 = v0x2 + 2ax (x - x0 ) to calculate the wagons final speed.Calculate the acceleration produced by the force.

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Problem Details
A little red wagon with mass 7.10 kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of 3.60 m/s and then is pushed 4.1 m in the direction of the initial velocity by a force with a magnitude of 10.0 N.

You may want to review (Pages 177 - 182).

For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Using work and energy to calculate speed.

Use the work-energy theorem to calculate the wagons final speed.

Use this acceleration in the kinematic relationship vx2 = v0x2 + 2ax (x - x0 ) to calculate the wagons final speed.

Calculate the acceleration produced by the force.

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