# on a alight incine, held at rest by the frictional force between the block a the...

on a alight incine, held at rest by the frictional force between the block a the tolowing starements is true? e block and the nd brce is equal to the gracitational potential energy of the biock s entirely converted into heat because of the friction present ehorce The the hui~ force pertrm-work, snce the trctional force is no work, since there is no motion of the block by the force is negative, uince the force of friction opposes the drection tha 3. The wos done by grevity is entirel e None of these ia mhiaty. 큐 bue aunamelle has twice the kinetic Energy that te a stap both have the same amount of braking force. The red auto energy that a red automobile has. Botha will stop aa the blue aua times the -fourth the the distance 7. A3.04 eat runs to the left at 10 m/, and a ongoing runs to the rent .aomrsT_ A -35 Joule 70 Joule E. 230 Joule. 8 A child riding on a swing rises to a height 1.0m above the lowest point. Anather c equal mass whose speed at the lowest point is twice as great will rise A to a height which depends on the mass. B to the same height C twice as high D. four times as high. 9. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m abs ground. When pushed up a slanting ramp 2.0 m in length a force of only 700 N is required constant velocity. Comparing the work involved in lifting the refrigerator straight up to th pushing it along the ramp, there is A less work required when the ramp is employed. s. more work required when the ramp is employed. C an equal amount of work is required in each case