Answer:
I = -12070 N.s
Explanation:
Given that:
mass of 1.0 metric tons = 1000 kg
initial speed = 72mi/hr = 32.19 m/s
final speed = 45mi/hr = 20.12 m/s
Impulse = change in momentum
I = mv-mu
I = m(v-u)
I = 10³(20.12 - 32.19)
I = 10³(-12.07)
I = -12070 N.s
The negative sign signifies that the impulse way is to the opposite direction.
Answer:

Explanation:
Mass of block=10 kg
Applied horizontal force =F=20 N
Friction force=f=10 N
We have to find the acceleration of block.
Net force=Applied horizontal force-friction force

Where F= Horizontal force
f=Friction force
m=Mass of object
a=Acceleration of object


Hence, the acceleration of the block=
Answer:
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