Motion and Force MCQs
Multiple choice questions
1.)The change in the position of body from its initial position to its final position then it is called
a) displacement. b) velocity
c) Acceleration. d) Force
Ans : a) displacement
2.) Time rate of change of displacement is known as
a) Motion.
b) Velocity
c) Acceleration.
d) Force
Ans : b) Velocity
3.) The direction of velocity is along the direction of
a) Motion. b) Velocity
c) Acceleration. d) displacement
Ans : d) displacement
4.) The limiting value of ∆d/∆t as the time interval ∆t , following the time t, approaches zero , then it is called
a) Instantaneous velocity
b) Instantaneous acceleration
c) Instantaneous force
d) Instantaneous displacement
Ans : a) Instantaneous velocity
5.) Fill in the blank.
Instantaneous velocity, Vins = Lim∆t→0 ______
a)∆v/∆t. b)∆d/∆t
c) v/∆t. d) ∆t/t
Ans : b) ∆d/∆t
6.) The time rate of change of velocity of a body is called
a) Motion. b) Displacement
c) Acceleration. d) Force
Ans : c) Acceleration
7.) Average acceleration, aav = _______
a)∆d/∆t. b) ∆v/∆t
c) ∆t/t. d) ∆d/∆v
Ans : b) ∆v/∆t
8.) Average velocity, vav = ______
a)∆d/∆t. b) d/t
c) ∆t/∆d. d) ∆v/∆t
Ans : b) d/t
9.) Instantaneous acceleration, ains = Lim∆t→0 ________
a)∆d/∆t. b)d/t
c) ∆t/∆d. d) ∆v/∆t
Ans : d) ∆v/∆t
10.) If the velocity of a body is increases the acceleration becomes
a) positive. b) nagetive
c) equal. d) uniform
Ans : a) positive
11.) If the velocity of a body is decreases the acceleration becomes
a) positive. b) nagetive
c) equal. d) uniform
Ans : b) nagetive
12.) The average acceleration of the car during the interval t is given by the slope of its ______ graph
a) displacement – velocity
b) Velocity – time
c) Time – acceleration
d) Acceleration – velocity
Ans : b) Velocity – time
13.) An object is moving in a uniform acceleration ‘a’ then final velocity can be expressed as
a) vf = vi + 2a²S
b) v²f = v²i + 2aS
c) vf = v²i + 2at
d) v²f = vi + 2aS²
Ans : b) v²f = v²i + 2aS
14.) In the absence of air resistance, all objects in free fall near the surface of the Earth, move forward the Earth with a uniform acceleration. This acceleration know as.
a) Acceleration due to charge
b) Acceleration due to displacement
c) Acceleration due to gravity
d) Acceleration due to velocity
Ans : c) Acceleration due to gravity
15.) The acceleration due to gravity near the surface of the Earth is
a)9.8 m/s². b)9.8 m²/s
c) 8.8 m/s. d) 9.8 m/s
Ans : a) 9.8 m/s²
16.) Fill in the blank.
The area between the velocity – time graph and the time axis is numerically ________ to the distance covered by the object.
a) equal.
b) ¼ times equals
c) ⅓ times equals.
d) ½ times equals
Ans : a) equal
17.) A body at rest will remain at rest, and a body with uniform velocity will continue to do so, unless acted upon by some unbalanced external force, this is known as
a) Newton’s first law
b) Newton’s second law
c) Newton’s third law
d) Motion in a plane
Ans : a) Newton’s first law
18.) The mass of the object is a quantitative measure of its _______
a) motion. b) inertia
c) Acceleration. d) velocity
Ans : b) inertia
19.) The mathematical expression of Newton’s second law of motion.
a) F = ma²
b) F = mc²
c) F = ma
d) F = am²
Ans : c) F = ma
20.) A force applied on a body produces acceleration in its own direction. The acceleration produced varies directly with the applied force and inversely with the mass of the body. It is,
a) Newton’s first law
b) Newton’s second law
c) Newton’s third law
d) Motion in a plane
Ans : b) Newton’s second law
21.) Linear momentum can be expressed as, p = _______
a)mv.
b) mv²
c) vm².
d) m²v²/2
Ans : a) mv
22.) SI unit of momentum can be written as
a) kgm-1s-1
b) kgms-1
c) kgm-1s-2
d) kgm-2s-2
Ans : b) kgms-1
23.) mvi is the initial momentum and mvf is the final momentum then
F×t =_______ where F is force and t is time
a) mvf – mvi
b) mvf + mvi
c) mvf × mvi
d) mvf / mvi
Ans : a) mvf – mvi
24.) Time rate of change of momentum of a body equal to ________
a) applied displacement
b) applied force
c) applied velocity
d) applied acceleration
Ans : b) applied force
25.) Every action there is an equal and opposite reaction. It is a
a) Newton’s first law
b) Newton’s second law
c) Newton’s third law
d) Motion in a plane
Ans : c) Newton’s third law
26.) The formular for impulse is
a)F×t.
b) Fc²
c) Fm.
d) Fmv
Ans : a) F×t
27.) The total initial momentum of the system before collision is _______ to the total momentum of the system after collision.
a) equal.
b) ½ times equals
c) ⅓ times equals.
d) ¼ times equals
Ans : a) equal
28.) The total linear momentum of an isolated system remains ________
a) zero.
b) constant
c) one.
d) infinite
Ans : b) constant
29.) A collision in which the kinetic energy of the system is not conserved, is called the,
a) Motion of the plane
b) Law of motion
c) Electric collision
d) Inelastic collision
Ans : d) Inelastic collision
30.) Force due to water flow, F = ________
a)(m/t)v.
b)-mv/t
c) mv²/t.
d) -m²v/t
Ans : b) -mv/t
31.) Force due to water flow, F = – mass per second × ___________
a) Change in flow of water
b) Change in time
c) Change in velocity
d) Change in force
Ans : c) change in velocity
32.) In a projectile motion horizontal distance x can be written as
a)vx/t.
b) vxt
c) vx+t.
d) vx-t
Ans : b) vxt
33.) In a projectile motion vertical distance y can be written as
a)gt².
b) g/t²
c) gt²/2.
d) g/2t²
Ans : c) gt²/2
34.) The two dimensional motion under constant acceleration due to gravity is called
a) Project motion. b) Motion in a plane
c) laws of motion. d) acceleration motion
Ans : a) Project motion
35.) Height of the projectile can be expressed as h = ________
a) vi²sinθ/2g
b) vi²sin²θ/2g
c) vi²sin²θ/g²
d) 2visinθ/g
Ans : b) vi²sin²θ/2g
36.) Time of flight can be defined as, t =______
a) visin²θ/2g
b) vi²sinθ/2g
c) 2visinθ/g
d) 2vi²sin²θ/g
Ans : c) 2visinθ/g
37.) Range of the projectile can be defined as R = __________
a) vi²sin2θ/g
b) visin²θ/2g
c) vi²sin²θ/2g
d) vi²sinθ/g
Ans : a) vi²sin2θ/g
38.) The ratio of the change in velocity ∆v that occurs within time interval ∆t to that time interval, called
a) Average velocity
b) Average acceleration
c) Average displacement
d) Average time
Ans : b) Average acceleration
39.) The motion of particle that thrown with an initial velocity and then moves under the action of gravity. This is called
a) Motion in a plane
b) Laws of motion
c) Acceleration motion
d) Projectile motion
Ans : d) Projectile motion
40.) According to Newton’s first law of motion,the velocity of an object will be constant if net force is _______
a) zero. b) one
c) -one. d) Infinite
Ans : a) zero
41.) Freely falling is a body moving under the influence of _________ alone
a) force.
b) gravity
c) velocity.
d) acceleration
Ans : b) gravity
42.) The average rate at which displacement vector changes with time, is called
a) Average velocity
b) Average acceleration
c) Average displacement
d) Average time
Ans : a) Average velocity