Reference no: EM132782585
1.A bow is drawn so that it has 50 J of elastic potential energy stored in the bow. Neglecting air resistance, at the moment the arrow is launched, the arrow will have a kinetic energy that is
a. less than 50 J
b. 50 J
c. More than 50 J
d. Impossible to predict without additional information
2.A skier skiing down a frictionless incline has its maximum speed
a. halfway down
b. at the top
c. at the bottom
d. depends on the incline of the ramp
3.A truck moves 4 times as fast as another identical truck. Compared to the slower truck, the faster truck has
a. 8 times the KE
b. 16 times the KE
c. 12 times the KE
d. 4 times the KE
4.Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr?
a. the 30 km/hr car
b. the 60 km/hr car
c. Both have the same kinetic energy
d. More information is needed about the distance traveled
5.Spring A is extended 4 times as far as another identical spring, called spring B. Compared to the spring B, spring A has
a. 8 times the Es
b. 16 times the Es
c. 12 times the Es
d. 4 times the Es
6.A diver who has a mass of 50 kg steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of
a. 500 J
b. 510 J
c. 10 J
d. 4900 J
7.Which of the following would have the greatest increase in gravitational potential energy
a. a person jumping to the ground out of a plane 50 meters above the ground
b. a mouse running across a power line 5m above the ground
c. a cat jumping from the group to the top of the fence at the height of 2m
d. a cheetah running across the ground, starting from rest and ending at a speed of 30 m/s