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love history [14]
3 years ago
10

José is pinned against the walls of the Rotor, a ride with a radius of 3.00 meters that spins so fast that the floor can be remo

ved without the riders falling. When the ride accelerates to a speed of 17.0 m/s, his angular momentum is 3,570 kg m2/s. What is his mass?
a. 23.3 kg
b. 70.0 kg
c. 179 kg
d. 630. kg
Physics
1 answer:
satela [25.4K]3 years ago
8 0

Answer:

179 kg

Explanation:

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A 1300-N crate rests on the floor. How much work is required to move it at constant speed (a)
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Explanation:

a)

In this first part of the problem, the crate is moved horizontally at constant speed.

The work required in this case is given by

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where

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d is the displacement of the crate

\theta is the angle between the direction of the force and of the displacement

Here the crate is moved at constant speed: this means that the acceleration of the crate is zero, and so according to Newton's second law, the net force on the crate is zero: this means that the force applied, F, must be equal to the force of friction (but in opposite direction), so

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b)

In this case, the crate is moved vertically. The force that must be applied to lift the crate must be equal to the weight of the crate (in order to move it a constant speed), therefore

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an example for applied force is

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