Name: Feyisaup Arowolo Work, Power and Energy TEST Date: Ol Period: And 1. As a spring is compressed, the spring's elastic potential energy - A Decreases B Increases C Remains the same D Could vary either up or down depending on the spring constant 2. Which of the following actions requires no work to be done on an object? A Lifting the object from the floor to a high shelf. B Pushing the object along a level table against a frictional force. C Applying the brakes on an object until it comes to a stop. D Holding the object stationary above the ground. 3. The table lists the mass and speed of each of the four objects. Which two Object Mass Speed objects have the same kinetic energy? kg) (m/s) 80 A Objects Q and R O 2.0 B Objects Q and T R 40 10 C Objects R and S D Objects R and T S 1.5 8.0 T 8.0 4.0 Three different boxes are lifted to different heights. . Box X weighs 115 N and is lifted to 15 m . Box Y weighs 210 N and is lifted to 10 m . Box Z weighs 305 N and is lifted to 5 m. 4, Using the information above, which of the following statements best describes the boxes' change in gravitational potential energy? A Box X had the greatest change in gravitational potential energy Box Z had the smallest change in gravitational potential energy C Boxes X and Y had the same change in gravitational potential energy D Boxes Y and Z had the same change in gravitational potential energy 5. How much work is done to move a sled 15 meters with an applied force of 20 N? A 2940 J B 1.33 J C 0.75 J D 300 J ( force) ( distance ) (20 ( 15) 6. How much power is required to do 630 J of work on a package being lifted by a delivery person in 30 s? A 16 W B 21 W C 58 W D 630 W 630 30 ( 630( 30) 80 0