Laws of Motion Test

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Laws of Motion Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following factors does gravitational constant depends?

A
Mass of objects

B
Distance between objects

C
Force acting between objects

D
All of these
Question 2
1 / -0

A ball is released from the top of building and it reaches the ground in 5 seconds. What is height of building and the velocity with which the ball will strike the ground? (Take g = 10 m/sec²)

A
125 m, 25 m/sec

B
125 m, 50 m/sec

C
150 m, 25 m/sec

D
150 m, 50 m/sec
Question 3
1 / -0

A pasta was thrown from the ground surface, with a velocity of 5 m/sec and it got stuck on roof. Find the height between ground and roof.

A
0.8 m

B
1.3 m

C
1.9 m

D
2.2 m
Question 4
1 / -0

Which of the following relationships is correct?

A
1 kgf = 9.85 N

B
g = 9.8 m/sec²

C
1 gf = 980 dyne

D
All of these
Question 5
1 / -0

Find radius of a planet if its mass is 5.96 × 12²⁴ kg.

(where g = 9.8 m/sec², G = 6.67 × 10-11 Nm²/ Kg²)

A
6.23 × 10⁹ m

B
6.37 × 10⁶ km

C
6.37 × 10⁶ m

D
6.6 × 10¹⁰ km
Question 6
1 / -0

The mass of an object is 5 kg and acceleration produced is 3 m/sec² from first second to sixth second. Find change in momentum.

A
100 kg m/sec

B
25 kg m/sec

C
50 kg m/sec

D
75 kg m/sec
Question 7
1 / -0

Which of the following options is correct that truly tells about the properties of mass and weight?

(1) It is a scalar quantity.
(2) It is the force with which earth attracts the body.
(3) It is measured by physical balance.
(4) It is measured by beam balance.

A
1 - mass, 2 - mass, 3 - weight, 4 - mass, 5 - weight

B
1 - weight, 2 - weight, 3 - mass, 4 - mass, 5 - mass

C
1 - mass, 2 - weight, 3 - mass, 4 - weight, 5 - mass

D
1 - mass, 2 - weight, 3 - mass, 4 - weight, 5 - weight
Question 8
1 / -0

A train of mass 3 × 10⁷ kg initially at rest is pulled by a force of 5 × 10⁴ N through a distance of 3 m. Assume air resistance to be negligible, find speed of train.

A
120.4 m/sec

B
100.1 m/sec

C
210.2 m/sec

D
112.6 m/sec
Question 9
1 / -0

Why does moon not fall and collide with Earth?

A
It is pulled by sun and planets.

B
It is beyond the main pull of Earth's gravity.

C
The net force acting on it is zero.

D
None of these
Question 10
1 / -0

Tom threw the ball vertically upwards with initial velocity of 10.2 m/sec. Find velocity with which it strike the ground and total time that it took to return to its initial position.

A
13.6 m/sec

B
10.2 m/sec, 2.08 sec

C
10.2 m/sec, 1.04 sec

D
20.4 m/sec, 2.08 sec
Question 11
1 / -0

What happens if the value of gravitational force of constant is very small in magnitude?

A
Gravitational force of attraction is not significant between ordinary bodies.

B
Gravitational force of attraction is significant between ordinary bodies.

C
Gravitational force of attraction is significant between heavenly bodies.

D
Both (1) and (3)
Question 12
1 / -0

Which of the following is correct value of G?

(where G is gravitational constant)

A
9.8 N kg^-2 m²

B
6.7 N kg^-1

C
6.7 × 10^-11 m/sec

D
6.7 × 10^-11 Nm²/ kg²

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Laws of Motion Test - 2

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Laws of Motion Test - 2

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Question 1

Mass of objects

Distance between objects

Force acting between objects

All of these

Question 2

125 m, 25 m/sec

125 m, 50 m/sec

150 m, 25 m/sec

150 m, 50 m/sec

Question 3

0.8 m

1.3 m

1.9 m

2.2 m

Question 4

1 kgf = 9.85 N

g = 9.8 m/sec2

1 gf = 980 dyne

All of these

Question 5

6.23 × 109 m

6.37 × 106 km

6.37 × 106 m

6.6 × 1010 km

Question 6

100 kg m/sec

25 kg m/sec

50 kg m/sec

75 kg m/sec

Question 7

1 - mass, 2 - mass, 3 - weight, 4 - mass, 5 - weight

1 - weight, 2 - weight, 3 - mass, 4 - mass, 5 - mass

1 - mass, 2 - weight, 3 - mass, 4 - weight, 5 - mass

1 - mass, 2 - weight, 3 - mass, 4 - weight, 5 - weight

Question 8

120.4 m/sec

100.1 m/sec

210.2 m/sec

112.6 m/sec

Question 9

It is pulled by sun and planets.

It is beyond the main pull of Earth's gravity.

The net force acting on it is zero.

None of these

Question 10

13.6 m/sec

10.2 m/sec, 2.08 sec

10.2 m/sec, 1.04 sec

20.4 m/sec, 2.08 sec

Question 11

Gravitational force of attraction is not significant between ordinary bodies.

Gravitational force of attraction is significant between ordinary bodies.

Gravitational force of attraction is significant between heavenly bodies.

Both (1) and (3)

Question 12

9.8 N kg-2 m2

6.7 N kg-1

6.7 × 10-11 m/sec

6.7 × 10-11 Nm2/ kg2

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g = 9.8 m/sec²

6.23 × 10⁹ m

6.37 × 10⁶ km

6.37 × 10⁶ m

6.6 × 10¹⁰ km

9.8 N kg^-2 m²

6.7 N kg^-1

6.7 × 10^-11 m/sec

6.7 × 10^-11 Nm²/ kg²