36.) When a 2.0 kg science textbook is sitting on a table that is 2.0 meters above the floor, how much gravitational potential energy does the textbook have? (GPE=mgh)

A force is acting on a 2.00 kg particle whose position changes with time as x = 4.0 t² - (1/3) t³, with x in meters and t in seconds. 8. find the work done on the particle by the force from t = 0 tot 3.0 sec. b. 327 J a. 256 J c. 164 J d. 225 J

A particle experiences a variable force F= (2+2x+ x^2)N that acts in the x direction. The work done by the applied force as the particle moves from x=-3m to x=+ 3m is equal to what? A. 120J B . 30J C. 18 J D.12J E. 0

A box of 10.0 kg is accelerated from rest by a horizontal force at a rate of 2.0 m/s2 for 10.0 seconds. a. What is the net work is done on the box? b. How much does the object’s kinetic energy change?  c. How much power is exerted by the force, in Watts?

2. A 900 kg elevator is raised by an electric motor up from the basement to the third floor, a vertical distance of 9.9 m, over the course of 5 s. There's a friction force of 125 N between the elevator and the elevator shaft. A. Draw a free body diagram of the elevator. Which forces are conservative? Which forces are dissipative? Which are external? B. How much potential energy does the elevator gain as its lifted? C. What is the work done by friction on the elevator? Is it positive or negative?

A spring with spring constant k is attached to the floor, standing vertically. You place a box of mass m on the spring and, from rest, release it. The spring bounces up and down a few times and comes to rest (both its velocity and acceleration are zero). Find the thermal energy generated in this process in terms of m, g, and k. Answer Options: A. mg/k   B. m^2 g/k C. m^2 g^2/k   D. m^2 g^2/ 2k   E. mg/2k

8. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. Find the potential energy of the ball. a. b. If the ball has a mass of 3.2 kg, what is its height above the ground? c. What is the speed of the ball?

QUESTION 5 A 12 Kg bowling ball is held 3 meters above the ground at sea level. Assuming that acceleration of gravity is 10 m/s^2, calculate the gravitational potential energy of the bowling ball.    a. 36 J.   b. 144 J.   c. 10 J.   d. 360 J.   e. 12 J.

A set of stadium stairs consist of 90, 20 cm high steps. A 70 kg runner is training bytraversing up and down the steps.a. What is the change of potential energy that occurs with each step? For all 90 steps?b. How much work is required to travel up the steps in 20 sec? In 15 sec?c. What is the power required to run up the steps in 20 sec? In 15 sec?d. What is the total work done over the course of the stadium training session? Why?

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