A force of 10 N acts on a body of mass 1 kg at rest.
The work done by the body in 4 seconds is
a) 80 J b) 800j c) 8j d) 8000j
Answers
Explanation:
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chinna6859294
chinna6859294
27.01.2021
Physics
Primary School
answered
a force of 10N acts on a body of mass 1kg at rest the work done by the body in 4 seconds is a)80J b)8000J c)8J d)8000J
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✯Question:
A force of 10N acts on a body of mass 1Kg at rest. Calculate the work done by the body in 4seconds.
✯Solution:
➢Given:
u = 0m/s (Body is at rest)
F = 10N
m = 1Kg
t = 4s
➢To find:
Work done
➢Answer:
S= ut + ½ at²
S= ½ × 10 × 16
S= 80
Displacement of the body is 80m
➢We know:
Work done = Force × Displacement
W = F × S
W = 10 × 80
W = 800J
✭ The work done is 800J
U=0m/s
F=ma
a=F÷m
So,a=10÷1=10
S=ut+1/2 at×t
=1/2 ×10×16
=80
W=FS
10×80
=800J
hence option B is correct
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