Question

A force of 100 N acting on a certain mass for 4 sec gives it a velocity of 20 m/s. Find the mass of the body if the body was initially at rest.

Answer 1

Here is the answer...!!!

Refer to the attachment...!!!

Answer 2

Answer:

m=20 kg

Explanation:

we have given that:-

F=100N

u=0m/s

v=20m/s

t=4 seconds

there is a formula:

F=ma

first we will find 'a':

a=v-u÷t

a=20-0÷4

a=20÷4

a=5 m/s

we have 'F' and 'a' now we will find 'm':-

so,

F=ma

100=m×5

m=100÷5

m=20 kg

Hence mass of the body is 20 kg

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