This document contains a physics test with multiple choice questions (Part A), reasoning questions (Part B), short answer questions (Part C), and long answer questions (Part D). The test covers topics in mechanics including motion, force, acceleration, momentum, friction, and Newton's laws of motion. It contains questions to calculate values like component forces, object acceleration, object momentum, and time for an object to fall.

1. physics test March 27, 2015
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Part A
MCQs
Note: Choose the right answer.
1: A …………. Is a notion of a scientist on which he tries to explain the phenomenon?
a) Theory b) hypothesis c) observation d) scientific law
2: …………..error is called zero error.
a) Personal b) Random c) Systematic d) N.O.T
3: ……….means comparison of unknown quantity with a standard.
a) Physical quantity b) Measurement c) Derived quantity d) Basic quantity
4: A body moves in a straight or curved path is called …………motion.
a) Stationary b) rotatory c) oscillatory d) vibratory
5: If the velocity of a body decreases continuously then the acceleration is saidto be negative and
is called……….
a) Deceleration b) retardation c) uniform acceleration d) average acceleration
𝟔: Change in velocity of the body as the result of gravitational attraction is called…………
a) Uniform speed b) gravity c) deceleration d) momentum
7: ………may be defined as any agent which produces distortion in a body to which it is applied.
a) inertia b) velocity c) motion d) force
8: (5.0× 𝟏𝟎 𝟒
) × (3.0× 𝟏𝟎−𝟔
)=
a) 1.5 × 𝟏𝟎−𝟑
b) 1.5 × 𝟏𝟎−𝟏
c) 𝟏. 𝟓 × 𝟏𝟎 𝟏
d) 1.5 × 𝟏𝟎−𝟑
9: Force can cause objects to …….
a) start moving b) stop moving c) change direction d) A.O.T
10: ……..is the tendency of an object not to accelerate.
a. mass b. force c. momentum d. inertia
11: …….is the measure of the amount of matter in a object, is also a measure of the inertia of an
object.
a) mass b) volume c) speed d) force
12: A ball is thrown vertically upwards with a velocity of 98 m/s and after 1 second it reaches the
maximum height. The acceleration of the ball is………
a) 98 m/s/s b) -98 m/s/s c) 9.8 m/s/s d) -9.8 m/s/s

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13: If the velocity of moving body decreases by equal amounts in equal intervals of time, how
small they may be, the body is said to have ……….acceleration.
a) zero b) uniform & +ve c) uniform & -ve d) N.O.T
14: The weight of tyre is 4N. A force of 28 is required to drag it on the road. Find the coefficient
of friction between the tyre and the road.
a) 7 b) 0 .7 c) 98 d) 12
15: A body of mass 1 kg is moving with a velocity of 15 m/s. A constant force acts for 4 seconds
and reduces its velocity to 2 m/s. what is the momentum after the application of force.
a) 100 N/s b) 20 N/s c) 40 N/s d) 8 N/s
Part B
REASONING
Note: Give the suitable reason to the following questions.
Q.1: The force due to gravity is twice as great on a 2 kg rock as it is on a 1kg rock. Why doesn’t
the 2 kg rock have greater free-fall acceleration?
Q.2: A truck loaded with sand accelerates at .5 m/s2 on the highway. If the driving force on the
truck remains constant, what happens to the trucks acceleration if sand leaks at a constant rate
from a hole in the truck bed?
Q.3: If a small sports car collides head-on with a massive truck, which vehicle experiences the
greater impact force? Which vehicle experiences the greater acceleration?
Q.4: What is the initial velocity of the car which starts from rest?
Q.5: What is the acceleration of a body moving with uniform velocity?
Part C
Short Answers
Note: Answers any ten questions.
Q.1: What is Physics? Name some important branches of Physics.
Q.2: What is the contribution of Al-Haitham in the field of Physics?
Q.3: Write the seven S.I fundamental quantities units.
Q.4: What is Random error?

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Q.5: What do you mean by a negative of vector?
Q. 𝟔: A force of 35N acts at the angle of 45 with the horizontal. Find its horizontal and vertical
components.
Q.7: Derive third equation of motion.
Q.8: A stone is dropped from the top of the building. It reaches the ground in 5s. Calculate the
height of the building.
Q.9: Explain the law of conservation of momentum.
Q.10: What is the difference between Mass and Weight?
Part D
Long Answers
Note: Answers any ten questions.
Q.1a: State Newton’s three laws of motion, giving example from everyday life.
Q.1b: Which object has the greater momentum (a. an object A of 45 kg moving at 3m/s or (b. an
object B of mass 3kg moving at 45m/s?
Q.2a: What is Friction? And define its types. Define methods of reducing Friction.
Q.2b: A piece of wood weighing 225N is paced on a horizontal pane. How much force is required
to set this piece in motion? (Co-efficient of friction is 0.4.
Q.3a: What is Tension? Derive the expressions for Tension and Acceleration of body moving in a
string when both move vertically.
Q.3b: A ball is dropped from a height of 114 m. How much time will it take to reach the ground?