What is wave? What does a wave carry with it

1 answer:

6 0

A wave carries energy from a source to a point some distance away. A wave is reflected by a barrier. The reflected wave moves away from the barrier at an angle that is equal to the angle with which the incoming wave moved towards the barrier. When a wave is slowed down, it refracts—that is, changes direction.

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A 3.42 kg steel ball strikes a massive wall at 14.3 m/s at an angle of α = 61.5° with respect to the plane of the wall. It bounc

iren [92.7K]

The magnitude of the average force exerted on the ball by the wall is 225.469 N.

<h3>What is impulse?</h3>

The change in momentum is equal to the product of impact force applied while colliding and time for that impact.

Impulse F. t = m (Vf -Vi)

where, Vf is the final velocity and Vi is the initial velocity.

Given is a 3.42 kg steel ball strikes a massive wall at 14.3 m/s at an angle of α = 61.5° with respect to the plane of the wall. It bounces off with the same speed and angle. The ball is in contact with the wall for 0.207 s

Substitute the values into the expression, we get

Impulse = 2 x mvcosθ

Impulse= 2 x 3.42 x 14.3 x cos 61.5°

Impulse = 46.672 kg.m/s

The impact force can be written as

F.t = I

Put the given values, we have

F = 46.672 / 0.207

F = 225.469 N

Thus, the magnitude of force exerted by the wall is 225.469 N

Learn more about impulse.

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2 years ago

Why should you be physically active?

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You should be physically active because you need to exercise or you might become overweight/obese. Exercise helps burn off calories which cause obesity. It is also good for your heart and lungs it keeps them active and healthy.

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The quartz crystal used in an electric watch vibrates with a frequency of 32,768 Hz. What is the period of the crystal's motion?

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Answer:

Time period, $T=3.05\times 10^{-5}\ s$