When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time o
1 answer:
Answer:
10 time smaller
Explanation:
Since the average force of impact is the impulse divided by the time of impact:
whereas impulse is the change of momentum (from full to rest) which is constant and independent of the time of impact. So if you make the time of the impact about 10 times as great as for a stiff-legged landing, the average force that you experience would be 10 times smaller.
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Answer:
The magnitude of the acceleration of the box is .
Explanation:
The free body diagram of the crate is included as attachment, whose equations of equilibrium are described below:
From second equation of equilibrium we find an expression for the normal force and find the respective value:
Lastly, the acceleration experimented by the crate during pushing is cleared in the first equation of equilibrium and consequently calculated:
The magnitude of the acceleration of the box is .
Answer:
21 m
Explanation:
The motion of the frog is a uniform motion (constant speed), therefore we can find the distance travelled by using
where
d is the distance covered
v is the speed
t is the time
The frog in this problem has a speed of
v = 2.1 m/s
and therefore, after t = 10 s, the distance it covered is