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Online Tests
Physics ECAT Pre Engineering Chapter 3 Motion and Force Online Test MCQs With Answers
Question # 1
A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:
Choose an answer
10 m/sec2
20 m/sec2
30 m/sec2
Zero
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Question # 2
When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is
Choose an answer
zero
negative
positive
non-existing
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Question # 3
Which quantity has the same units as impulse
Choose an answer
force
work
linear momentum
acceleration
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Question # 4
When we consider the average velocity of a body, then the body is moving in
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straight line
curved path
may be in a straight or curved path
none of them
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Question # 5
Acceleration of a body at any particular instant during its motion is known as
Choose an answer
average acceleration
uniform acceleration
instantaneous acceleration
all of them
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Question # 6
In above figures, tell which set of graphs shows that a body is moving with uniform velocity:
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(i) and (ii)
(ii) and (iii)
(iii) and (iv)
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Question # 7
The collision in which KE is conserved but momentum is not conserved is called:
Choose an answer
Elastic collision
Inelastic collision
any these
None of these
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Question # 8
A typical rocket consists of fuel
Choose an answer
more than 60% of launch mass
less than 60% of launch mass
less than 80% of launch mass
more than 80% of launch mass
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Question # 9
One newton is a force that produces an acceleration of 0.5 m/sec
2
in a body of mass:
Choose an answer
2 Kg
3 Kg
4 Kg
8 Kg
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Question # 10
If m is the mass of the gases ejected per second with velocity v relative to the rocket of mass M, then the acceleration of rocket is
Choose an answer
a = M/mv
a = mM/v
a = mv/M
a = v/mm
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Question # 11
Which of the following is not a projectile
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a bullet fired from a gun
a space ship
a football in air
an artillery shell
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Question # 12
For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to
Choose an answer
Four times
Thrice
Once
Twice
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Question # 13
When a horse pulls a cart, the force that makes the horse run forward is the force exerted by
Choose an answer
The horse on the ground
The horse on the cart
The ground on the horse
The ground on the cart
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Question # 14
The motion in a plane is the motion in
Choose an answer
one dimension
two dimension
three dimension
four dimension
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Question # 15
Linear momentum is a
Choose an answer
fixed quantity
constant quantity
scalar quantity
vector quantity
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Question # 16
Rocket engines lift a rocket from the earth surface, because hot gas with high velocity
Choose an answer
Push against the air
React against the rocket and push it up
Heat up the air which lifts the rocket
Push against the earth
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