Question

a 42.0 kg projectile is launched horizontally from the top of
a cliff, 50 meters above the ground. the projectiles initial speed
is 30 m/s.

use g=10m/s^2

A)What is the projectiles inti kinetic energy?

B)What is the projectiles total mechanical emergy the moment
is launch?

C)What is the projectiles initial gravitational potential
energy?

D)if air resistance and other forms of friction are
negligible, the projectile speed as it flies to the ground. As this
happens, the kinetic energy will ____________, the grabitational
potential energy will ____________, and the total mechanical energy
will_________.

E) The projectiles height is approximately zero the moment
before it hits the ground. what will be its velocoty at this
moment?

Answer #1

A 0.50 kg projectile is launched horizontally at 17.9 m/s from a
50.0 m-high cliff above level ground. Determine it speed just
before it hits the ground. (Answer in m/s.)

A projectile is launched horizontally from a cliff that is
15.0 m above the ground with an initial velocity of 7.50 m/s. How
far from the base of the cliff does it land?
13.1m
1.75m
23.0m
3.06m

a
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