A box is pulled 2.0 meters along a rough surface at constant velocity using 100 N force inclined at 30° above the horizontal.  a. How much work is done by the gravitational force? b. How much work is done by the normal force? c. How much work is done by the frictional force?

Choose all the correct statement that applies to Work.   A. Work is the product of force and distance.   B. Work is a vector quantity.   C. Work is a scalar quantity.   D. work has magnitude only.

A woman at the gym lifts a weight upwards. a) Does she do positive work on the weight, negative work on the weight, or no work on the weight? Explain how you know. b) Does the Earth (i.e. the force of gravity) do positive work on the weight, negative work on the weight, or no work on the weight? Explain how you know.

Two children have identical spring-loaded catapults, which contain springs with spring constant k. If Samir compresses the spring in his catapult by a distance x and Mona compresses hers by a distance 2x, how does the work they have done to compress their catapults compare? A. Mona has done 2 times as much work as Samir. B. Samir has done 2 times as much work as Mona. C. They have done the same amount of work. D. Mona has done 4 times as much work as Samir.

Suppose a 1300-kg elevator car is lifted a distance 45 m by its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 1350 N. 1.Calculate the work done on the elevator by its cable, in joules.  2.Calculate the work done by the gravitational force on the elevator, in joules, during this process.  3.Calculate the total work done on the elevator, in joules.

1. A constant 15 N horizontal force is applied to a 15 kg cart at rest on a level floor. If friction is negligible, what is the speed of the cart after it has gone 8.0 m? Think and Prepare 1. You are going to use the Work-Energy Theorem for this problem 2. How will you figure out the change in KE of the cart? 3. How will you figure out the work done by the force? Enter to 2 significant figures Speed after 8 m = m/s

You push your physics book 2.10 m along a horizontal tabletop with a horizontal push of 2.10 N while the opposing force of friction is 0.700 N. A. How much work does your 2.10 N push do on the book? B. How much work does the friction force do on the book? C. How much work does the normal force from the table do on the book?