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3 years ago

What is the average acceleration of a rocket that travels 400m in 5s if it starts from rest?

Physics

1 answer:

Pavel [41]3 years ago

4 0

Answer:

Explanation:

We want to find the acceleration based on the given data

Given

distance s=400m

time t= 5s

u= 0m/s since it started from rest

We apply the following expression

s=ut+1/2at^2

substituting we have

400=0*5+1/2*a(5)^2

400=25a/2

cross multiply

25a=400*2

25a=800

divide both sides by 25 we have

a=800/25

a=32m/s^2

The acceleration is 32m/s^2

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1 year ago

A 40 kg boy is moving upwards upwards in a lift with an acceleration of 2 m /s ^2 what would be the weight felt by him if measuu

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Answer:

$f = ma \\$

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$f \: = ma \\ f - mg = ma \\ f = ma + mg \\ f = 40 \times 2 + 40 \times 10 \\ f = 480$

$w = \frac{f}{g} \\w = \frac{480}{10} \\ w = 48kg$

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3 years ago

What is the average acceleration of a rocket that travels 400m in 5s if it starts from rest?​

What is the average acceleration of a rocket that travels 400m in 5s if it starts from rest?