A 20 N object is lifted a distance of 5.0 meters. The object has 100.0 N of potential energy. True or false

When an 81.0 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.00×10³ J. By how much does the potential energy of a 18.0 kg child increase when the child climbs a normal staircase to the second floor?

A 33.00 kg block starts from rest at the top of a 23.0 m long 30.0° incline. Its kinetic energy at the bottom of the incline is 3719.1 J. How much work is done by friction?

Below is the potential energy diagram for a 50 gram particle. If the particle's mechanical energy is 7J: 10 U (1) 9 8 7 6 5 4 3 2 1 0 1 2 3 4 6 7 8 9 10 11 12 x (cm) A. Draw a line corresponding to the total Energy on the diagram. B. Assume the particle is moving in the positive x direction. Where is the particle speeding up? C. Assume the particle is moving in the positive x direction. Where is the particle lowing down? D. Where are any turning points in the particle's motion? E. What is the particle's speed at x=5 cm? F. What is the particle's maximum kinetic energy? Where does that occur? G. Suppose the particle's energy is decreased to 4J while the particle is between positions x = 7 cm and x = 9 cm. What is the particle's new maximum speed? Where does that occur?

A 40 N object has 80 joules of potential energy. The object is at a height of 0.5 meters. True or false

A 7.44-kg particle is subject to a net force that varies with position as shown in the figure. The particle starts from rest at x = 0. Fx (N) 3 2 2 4 6 8 10 12 14 16 What is its speed at the following positions? (a) x = 5.00 m 154.32 X Can you determine the kinetic energy of the particle at x = 5.00 m from the given graph? m/s (b) x = 10.0 m 154.33 x (m) X You appear to have added your result from part (a) to a speed calculated from the work done between 5 and 10 m. This doesn't work; you must calculate the work done over the entire 10 m distance. m/s (c) x = 15.0 m 151.31 X The force is positive throughout the entire interval. Does it make sense that the speed would decrease m/s

A 7.44-kg particle is subject to a net force that varies with position as shown in the figure. The particle starts from rest at x = 0. Fx (N) 3 2 2 4 6 8 10 12 14 16 What is its speed at the following positions? (a) x = 5.00 m x (m) X Can you determine the kinetic energy of the particle at x = 5.00 m from the given graph? m/s (c) x = 15.0 m (b) x = 10.0 m 1 X How would you calculate the total work done on the particle between 0 and 10 m? m/s X The force is positive throughout the entire interval. Does it make sense that the speed would decrease m/s

When a car is moving at constant speed, the developed potential is used to overcome the frictional forces exerted by the air and the road. If the power developed by the motor is 50.0 hp, what is the total frictional force acting on the car at 24.6 m / s? 1 hp = 746 W.

A 2.5 kg bowling ball is tied to a 1m long string attached to the ceiling. The ceiling is 5 m above the floor. What is its change in potential energy relative to the floor? 31.3 J O 122.5 J 98.0 J O 24.5 J

A particle, mass 8 kg, moves along the y axis with a speed of 3.3 m/s. It experiences a force of 16 N directed along the x axis. What power is imparted to the particle by the force 9.69 J/s x 9.69