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Mcq > MCQ on Motion in Straight Line
Motion in a Straight Line
MCQs for NEET
When an object changes its position with respect to
its surroundings with time, it is called a motion.
There are three types of motion as follows:
One dimensional motion
Two-dimensional motion
Three-dimensional motion
There are different graphs of motion as follows:
Displacement-Time Graph
Velocity-Time Graph
Acceleration-Time Graph
Following are the equations of uniformly accelerated
motion:
v= u+at
s=ut+at2
v2=u2+2as
Question and Answer
1. What is the acceleration if the body starts from
rest and travels a distance of ‘s’ m in 2 seconds?
( 23 s) m/s2
3
2
b. ( 2 s) m/s
1
2
c. ( 3 s) m/s
2
s
d. ( 2 ) m/s
a.
Answer: (d)
( 2s ) m/s2
2. What is the ratio of the average acceleration
during the intervals OA and AB in the velocity-time
graph as shown below?
a.
b.
c.
d.
½
⅓
1
3
Answer: (b) ⅓
3. A body covers 16, 18, 20, 22 meters in 5th, 6th, 7th
and 8th seconds respectively. Which of the following
statements is true about the body?
a. The body moves with a uniform velocity from
rest
b. The body from rest moves with uniform
acceleration
c. The body moves with an initial velocity and
moves with uniform acceleration
d. The body moves with an initial velocity and
then moves with uniform velocity
Answer: (c) The body moves with an initial velocity
and moves with uniform acceleration
4. What can be said about the displacement of the
body if it covers a distance of zero?
a.
b.
c.
d.
It is zero
It cannot be zero
It may or may not be zero
It is negative
Answer: (a) It is zero
5. An athlete anishes a round of circular track of
radius R in 40 sec. What is his displacement at the
end of 2 min 20 sec?
a.
b.
c.
d.
2R
2πR
7πR
Zero
Answer: (d)2R
6. Which of the following is not possible for a body in
uniform motion?
a.
b.
c. (c) Both (a) & (b)
d. (d) None of the above
Answer: (c) Both (a) & (b)
7. If a car travels ⅖ th of the total distance with a
speed v1 and ⅗ th of the distance with a speed v2.
The average speed is given by
2v1v2
a. v1+v2
1
b. 2 √v1v2
5v1v2
c. 3v1+2v2
v1+v2
2
d.
Answer:(c)
5v1v2
3v1+2v2
8. A man leaves home for a cycle ride and comes
back home after an half-an-hour ride covering a
distance of one km. What is the average velocity of
the ride?
a.
b.
c.
d.
10 kms-1
½ kms-1
2 kms-1
Zero
Answer: (d) Zero
9. A bird hies with a speed of 10 km/hr and a car
moves with uniform speed 8 km/hr. Both start from
B to A at the same instant (BA = 40 km). The bird
after reaching A hies back immediately to meet the
approaching car. Once it reaches the car, it hies back
to A. The bird repeats this until both the car and the
bird reach A simultaneously. What is the total
distance hown by the bird?
a.
b.
c.
d.
80 km
50 km
40 km
30 km
Answer: (b) 50 km
10. Elephants A, B and C move with a constant speed
in the same direction along a straight line as shown
in the agure. The speed of the elephant A is 5 m/s
and the speed of the elephant C is 10 m/s. Initially,
the separation between A and B is d and between B
and C is also d. When B catches C, the separation
between A and C becomes 3d. What will the speed of
B be?
a.
b.
c.
d.
5 m/s
7.5 m/s
15 m/s
20 m/s
Answer: (c) 15 m/s
11. Which of the following remains constant if a
body travels with constant acceleration?
a.
b.
c.
d.
Time
Velocity
Displacement
None of the above
Answer: (d) None of the above
12. Given here is a velocity-time graph of the motion
of a body. What is the distance travelled by the body
during the motion?
1
a. 2 (OA + AB) × BC
1
b. 2 (OA + BC) × OC
1
c. 2 (OC + AB) × AD
1
d. 2 (AD + BE) × OC
Answer: (c)
1 (OC
2
+ AB) × AD
13. Which of the following graphs gives the equation
x = v0t + 12 at2
a.
b.
c.
d. None of the above
Answer: (b)
14. What does the displacement of the particle
shown in the graph indicate?
a. It indicates a constant velocity
b. It indicates a constant acceleration
c. It indicates that the particle starts with a
constant velocity and is accelerated
d. It indicates that the motion is retarded and the
particle stops
Answer: (d) It indicates that the motion is retarded
and the particle stops
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