How much work is required to accelerate a 1000 kg car from 20 m/s to 30 m/s?
Answers
Answered by
9
Work= force(F)×distance (s)
weight is a force
Force=weight=mass×acceleration due to gravity
=1000×10=10000N
S=???
To find s,
F= ma
a=F/m=10000/10
a=10m/s²
Using Newton's third equation of motion
v²= u²+2as
30²= 20²+2×10×s
900–400=20s
500=20s
s=500/20= 25m
Work =F×s
Work=10000×25
Work= 250000J or 250KJ
weight is a force
Force=weight=mass×acceleration due to gravity
=1000×10=10000N
S=???
To find s,
F= ma
a=F/m=10000/10
a=10m/s²
Using Newton's third equation of motion
v²= u²+2as
30²= 20²+2×10×s
900–400=20s
500=20s
s=500/20= 25m
Work =F×s
Work=10000×25
Work= 250000J or 250KJ
Answered by
3
Step-by-step explanation:
Work= force(F) * distance (s)
weight is a force and so
F=weight=mass *acceleration due to gravity
=1000*10=10000N
S=?
To find s,
F= ma
a=F/m=10000/10
a=10m/s²
Using Newton's third eqn of motion
v²= u²+2as
30²= 20²+2*10*s
900–400=20s
500=20s
s=500/20= 25m
Work =F*s
Work=10000*25
Work= 250000J or 250KJ
Similar questions