Answer:
20,000,000 N
Explanation:
First find the acceleration:
a = Δv / Δt
a = (0 − 40 m/s) / 0.010 s
a = -4000 m/s²
Next use Newton's second law to find the force on the car:
F = ma
F = (5000 kg) (-4000 m/s²)
F = -20,000,000 N
According to Newton's third law, the force on the wall is equal and opposite the force on the car.
F = 20,000,000 N
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Hope this helped
To determine the maximum height for the projectile, we can use the timeless kinematics equation
and plug in what we know. For
, we know it is zero because at the highest location of flight, there is no vertical velocity. For
, we know it is
since the vertical component is the sine of the velocity. We need to solve for
, so it is left as-is. Since the only acceleration is
, we can substitute -9.81 into it. Solving for the equation yields a solution of 17.55 m for
.
Answer:
b
Explanation:
air mass surrounding the earth
<span>After collison they stick together and have same velocity Vf
From the momentum conservation,
(m1 + m2)Vf = m1v1 + m2v2
Second is moving with half of first cart speed, (m1 + m2)Vf = m1v + m2v / 2
2(m1 + m2)Vf = (2m1v + m2v) =>Vf = ((2m1 + m2) v) / 2(m1 + m2)
Identical carts so m1 = m2 = m
vf = 3mv / 4m => Vf = 3v / 4</span>
