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nekit [7.7K]
3 years ago
11

A 70-kg ice skater is standing still on the ice, when a friend tosses him a 10-kg ball that is traveling at +8 m/s. If he catche

s it, what would be the velocity of the person holding the ball? What type of collision is this?
Physics
1 answer:
Misha Larkins [42]3 years ago
7 0

Answer:+1.25 m/s

Explanation:

Given

mass of ice skater M=70 kg

mass of ball m=10 kg

the initial velocity of the ball  u_1=+8\ m/s

Conserving linear momentum

M\times0+m\timesu_1=(M+m)v\quad \quad [v=\text{combined velocity of skater and ball}]

v=\dfrac{10\times10}{80}=+1.25\ m/s

Therefore the velocity of the person holding the ball is 1.25 m/s

This collision represents the perfectly inelastic collision where particles stick together after the collision.

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spin [16.1K]

By definition, the centripetal acceleration is given by:

a = \frac{v^2}{r}

Where,

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Clearing the radio we have:

r = \frac{v^2}{a}

Substituting values we have:

r =\frac{0.51 ^ 2}{0.43}\\r = 0.6 m

Therefore, the radius of the circular path is equal to 0.60 meters.

Answer:

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2 years ago
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3 years ago
What type of energy does a spinning turbine have?
Alenkasestr [34]
The type of energy that a spinning turbine has is called mechanical energy. When an objects kinetic energy is added to the objects potential energy is makes mechanical energy. The correct answer is D.
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As a rocket travels upward from earth, air resistance decreases along with the force of gravity. The rocket's mass also decrease
ddd [48]

Answer:

The decrease of these factors increases the acceleration.

Explanation:

Hi, the decrease of these factors increases the acceleration.

Air resistance is a force opposing the acceleration. So if it decreases, the acceleration increases, because the opposite forces decreases.

The same is applied to the force of gravity, since the rocket travels upward; gravity is also an opposite force.

Finally, if the mass decreases, it means that the rocket becomes lighter and the force acting on the smaller mass causes an increase in the acceleration.

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