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Lelu [443]
2 years ago
10

A merry-go-round at a playground is a circular platform that is mounted parallel to the ground and can rotate about an axis that

is perpendicular to the platform at its center. The angular speed of the merry-go-round is constant, and a child at a distance of 1.4 m from the axis has a tangential speed of 2.2 m/s. What is the tangential speed of another child, who is located at a distance of 2.1 m from the axis?
(a) 1.5 m/s
(b) 3.3 m/s
(c) 2.2 m/s
(d) 5.0 m/s
(e) 0.98 m/s
Physics
1 answer:
hram777 [196]2 years ago
8 0

Answer:

V_2=3.3m/s

Explanation:

From the question we are told that:

Distance d_1=1.4m

Tangential speed V=2.2m/s

Distance 2 d_2=2.1m

Generally the equation for Angular velocity is mathematically given by

 w=\frac{v}{r}

Therefore

 \frac{v_1}{r_1}=\frac{v_2}{r_2}

 V_2=\frac{2.2*2.1}{1.4}

 V_2=3.3m/s

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A 300 kg car initially travels with a velocity of 20 m/s to the right. A net force F acts on the car for 5 s, which causes the v
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Answer:

<em>600N.</em>

Explanation:

From the question, we are to calculate the net force acting on the car.

According to Newton's second law of motion:

F = ma

m is the mass of the car

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a = v-u/t

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<em>Hence the net force acting on the car is 600N.</em>

<em></em>

<em></em>

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3 years ago
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