the neutron I hope i could help :)
The ball is moving 60 mph from the observers POV because the ball already has a speed of 50mph and the man is able to throw it at a speed of 10mph
and when you add 50mph and 10mph = 60mph.
That will be 450 plus 300 equals 750 for an answer
I'm not sure is
F is right but I didn't my best
The final velocity of the rock is 19.8 m/s
Explanation:
The motion of the rock is a free fall motion (subjected only to the force of gravity), with constant acceleration towards the ground. Therefore, we can use the following suvat equation:
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the vertical displacement
For the rock in this problem,
u = 0 (initial velocity is zero)
s = 20 m (height of the cliff)
Solving for v,
Learn more about free fall motion:
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