АВС (meters)
(joules)
1.0
48
1.5
72
2.0
96
lesha says that a ball dropped from a height of 3.0 meters would have less than 96
joules of kinetic energy when it hits the ground. Is she correct and why?
She is correct because the higher the ball is dropped from, the
A
less kinetic energy it will have when it hits the ground
She is correct because the higher the ball is dropped from the
greater kinetic energy it will have when it hits the ground
She is incorrect because the higher the ball is dropped from the
greater kinetic energy it will have when it hits the ground.
D
She is incorrect because the higher the ball is dropped from the
less kinetic energy it will have when it hits the ground.

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0