Motion in One Dimension Test

Result

Motion in One Dimension Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

An object moves with a uniform velocity of 9.8 m/s. Its acceleration is

A
4.9 m/s²

B
zero

C
9.8 m/s²

D
19.6 m/s²

Solution

Correct Answer: zero
As the object is moving with uniform velocity so there will be no acceleration.
Question 2
1 / -0

A body covers a distance in 3 hr 48 min at 5 km/hr. How much time will it take to cover the same distance at 28.5 km/hr?

A
19 min

B
40 min

C
28.8 min

D
17.5 min

Solution

Correct Answer: 40 min
as we know, speed= distance/time
so in first case when speed is 5 km/hr and total time taken is 3 hr and 48 minutes i.e. 3.8 hours
total distance = speed x time
so, distance = 5 x 3.8 = 19 i.e. distance covered is 19 km
now using this distance we can find the time taken in second case as follows:
now the speed is 28.5 km/hr, so using the relation speed= distance/time once again,we find,
28.5 = 19/t
t = 19/28.5 = 0.66 hr i.e. 0.66 x 60 minutes = 40 min
Question 3
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A scooterist travels for six hours. If he covers half of the distance at 60 km/hr and the rest at 48 km/hr, calculate the total distance travelled by him.

A
320 km

B
160 km

C
640 km

D
None of these
Question 4
1 / -0

The area of a square field is one hectare. The time taken by a boy to run once around it at a speed of 10 km/hr is

A
15.5 minutes

B
10 minutes

C
15 minutes

D
2.4 minutes
Question 5
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A column of marching battalion extending to 250 m in length takes one hour to march through a street at the rate of 50 paces a minute, each pace being 75 cm. The length of the street is

A
3 km

B
4 km

C
2 km

D
1 km
Question 6
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Which of the following is true about displacement?

A
It cannot be zero.

B
It is a scalar quantity.

C
Displacement covered may be positive, negative or zero.

D
Displacement between two given points is different.
Question 7
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A person throws a ball upwards to a height `h`, and catches the ball back. What will be the distance and displacement covered by the ball?

A
h, 2h

B
2h, 0

C
2h, h

D
None of these
Question 8
1 / -0

A person moves on a semi-circular track of radius 84 m. He starts from one end of the track and reaches the other end. Find the distance covered and the displacement of the person.

A
132 m, 84 m

B
168 m, 168 m

C
264 m, 168 m

D
14 m, 10 m
Question 9
1 / -0

Which of the following statements is true?

A
Speed is a vector quantity.

B
Speed may have negative value.

C
SI unit of velocity is ms^-1.

D
All of these are true.
Question 10
1 / -0

The velocity of a car is 18 m/s. What is its equivalent in km/hr?

A
0.018 km/hr

B
64.8 km/hr

C
64800 km/hr

D
0.005 km/hr
Question 11
1 / -0

If the displacement of a body is zero, the distance travelled by it will be

A
zero

B
non zero

C
negative

D
cannot be determined
Question 12
1 / -0

What does a speedometer record?

A
Average speed

B
Average velocity

C
Instantaneous speed

D
Displacement
Question 13
1 / -0

The numerical ratio of displacement to distance is

A
always less than one

B
more than one

C
equal to one

D
equal to or less than one
Question 14
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A person starts his journey from point A and travels 5 m and reaches point B, then takes a 90^o turn and travels another 12 m up to C. What is the total displacement?

A
17 m

B
13 m

C
25 m

D
Zero
Question 15
1 / -0

A body is moving along a circular path of radius r. What will be its distance and displacement, when it completes half a revolution?

A
r, r

B
r, 2 r

C
2r, 2 r

D
r, 2r
Question 16
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Which of the following is the distance-time graph for a stationary body?

A

B

C

D
Question 17
1 / -0

Three graphs are shown below. Choose the correct statement from the following.

(i)

(ii)

(iii)

A
Only (i) graph is possible.

B
Only (ii) and (iii) are possible.

C
All these graphs are possible.

D
Nothing can be said.
Question 18
1 / -0

The displacement-time graph of two bodies A and B is shown in the figure. Which of the following statements is correct?

A
A and B are moving side by side.

B
A is moving faster than B.

C
B is moving faster than A.

D
A is always 20 m behind B.
Question 19
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Consider the distance-time graph shown below:

During which interval does the velocity of the particle become zero?

A
OA

B
AB

C
BC

D
CD

Solution

During the interval AB velocity of the object is zero because there is no change in displacement
of the object.
Question 20
1 / -0

The figure shows the displacement-time graph of a particle moving along x-axis.
Which of the following statements will describe the motion of the particle correctly?

A
The particle is moving continuously.

B
The velocity of the particle increases up to time t₁ and then becomes constant.

C
The particle moves with a constant velocity up to time t₁ and then stops.

D
The particle is at rest.

Solution

The particle moves with a constant velocity up to time t₁ as its displacement is changing with time but after t₁, there is no change in displacement of the object.