Ball A of mass 0.1 kg is dropped from rest from a certain height. Ball B of mass 0.2 kg is dropped from rest from the same height. Ignoring air resistance, which of the following will be different for these two balls?
(A) impact speed with the ground (C) magnitude of momentum at impact with the ground
(B) time to fall to the ground (D) acceleration during the fall

it is the second option.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.