Two froghoppers sitting on the ground aim at the same leaf, located 35 cm above the ground. froghopper a jumps straight up while froghopper b jumps at a takeoff angle of 58o above the horizontal. which froghopper experiences the greatest change in kinetic energy from the start of the jump to when it reaches the leaf?

change in kinetic energy of both froghopper will be same

Explanation:

By work energy theorem we know that

Work done by all forces = change in kinetic energy

Here we know that two froghopper are sitting at same height and both jumps with same kinetic energy at different angles

1) First jump vertically upwards

2) Second jumps at an angle of 58 degree

so here while they are in air only gravitational force will work on it

so work done by gravity = change in kinetic energy

since both are initially at same height so work done by gravity on both of them will be same

So change in kinetic energy of both froghopper will be same

the answer would be c

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.