Answer:
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Explanation:
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The angle of reflection is equal to the angle of incidence there it will be reflected at an angle of 30 degrees from the normal
Answer:
5.6 m/s
Explanation:
The acceleration of any possible is the ratio of the velocity of the particle with respect to the time the particle takes in moving. It is mathematically represented as
a = v/t, with m/s² as it's unit, where
v = velocity in m/s
t = time taken in seconds
a = acceleration in m/s²
From the explanation above, we were given in the question that, the speed is 112 m/s and the time if took is 20 seconds, thus, the acceleration is
a = 112/20
a = 5.6 m/s²
Therefore, the magnitude of the acceleration is 5.6 m/s²
Answer:
455 kg m/s
Explanation:
The impulse acted on the object is equal to the change in momentum of the object:
and the change in momentum is equal to the product between the mass of the object and the change in velocity:
where:
m = 25 kg is the mass of the object
u = 12 m/s is the initial velocity of the object
v = -6.2 m/s is the final velocity of the object (we have taken a negative sign because the object now moves in the opposite direction)
Therefore, the impulse is
