Physics, asked by areejfatima1245, 9 months ago

under the influence of a force an object of mass 4kg accelerates from 3 metre per second to 6 metre per second in seconds how much work was done on the object during this time​

Answers

Answered by mythilir2011
0

Answer:

54 j

Explanation:

We can use Newton's 2nd Law to find the magnitude of the force:

F

=

m

a

The acceleration a is the rate of change of velocity:

a

=

Δ

V

t

=

6

3

8

=

0.375

x

m/s

2

F

=

4

×

0.375

=

1.5

x

N

The work done is the force x the distance travelled in the direction of the force.

To find the distance travelled during this time we can use:

v

2

=

u

2

+

2

a

s

6

2

=

3

2

+

(

2

×

0.375

×

s

)

36

=

9

+

0.75

×

s

s

=

27

0.75

=

36

x

m

W

=

F

×

s

=

1.5

×

36

=

54

x

J

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