ASSIGNMENT-2-FORCE AND LAWS OF MOTION:
Q-1) A large bus and a van, both moving with a velocity of magnitude v, have a
head on collision and both the vehicles stop after the collision, if the time of
Collision is 1 second then.
a.) Which vehicle experiences smaller force of impact?
b.) Which vehicle experiences the smaller momentum change?
c.) Which vehicle experiences the greater acceleration?
d.) Why is that truck suffers less damage the car?
Q-2) Define inertia
Q-3) what force is needed to produce on acceleration of 2m/s in a body of
mass 3 kg?
Q-4) What is meant by balanced forces?
Q-5) What is force?
Q-6) A person is prone to more serious injuries when falling from a certain
height on a hard-concrete floor than on a sandy surface, explain why.
Q-7) Give a simple experiment to illustrate the inertia of rest.ASSIGNMENT-2-FORCE AND LAWS OF MOTION:
Q-1) A large bus and a van, both moving with a velocity of magnitude v, have a
head on collision and both the vehicles stop after the collision, if the time of
Collision is 1 second then.
a.) Which vehicle experiences smaller force of impact?
b.) Which vehicle experiences the smaller momentum change?
c.) Which vehicle experiences the greater acceleration?
d.) Why is that truck suffers less damage the car?
Q-2) Define inertia
Q-3) what force is needed to produce on acceleration of 2m/s in a body of
mass 3 kg?
Q-4) What is meant by balanced forces?
Q-5) What is force?
Q-6) A person is prone to more serious injuries when falling from a certain
height on a hard-concrete floor than on a sandy surface, explain why.
Q-7) Give a simple experiment to illustrate the inertia of rest.
Answers
Answer:
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...............1.............
Let, Mass of truck =M
Mass of car=m
Velocity of truck=v
Time=1s
After collision,
According to third law of motion both the truck and the car will exert same force on each other in opposite direction at same time.
We know,
Force = change in momentum per unit time.
F=
t
m(v−u)
p=m(v−u)=Ft
because force and time is same for both the truck as well as car; so the change in momentum of truck is equal and opposite to change in momentum of car.
.............2...........
the physical force that keeps things where they are or keeps them moving in the direction they are travelling
............3............
The SI unit of force is Newton or N. So, the force needed to produce an acceleration of 2 m/s in a body of mass 3 kg is 6 N.
............4............
Balanced forces: Balanced forces are those that are opposite in direction and equal in size. Balanced forces are considered to be in a state of equilibrium.