Advertisements
Advertisements
Question
An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. The force required to keep this object moving with the same velocity is :
Options
32 N
0 N
2 N
8 N
Advertisements
Solution
0 N
Explanation:
The object will keep on moving on a frictionless horizontal surface by itself due to Newton’s First law of motion.
RELATED QUESTIONS
Fill in the following blank with suitable word :
Newton’s first law of motion is also called Galileo’s law of ………………………
A particle is found to be at rest when seen from a frame S1 and moving with constant velocity when seen from another frame S2. Mark out the possible options.
(a) Both the frames are inertial.
(b) Both the frames are non-inertial.
(c) S1 is inertial and S2 is non-inertial.
(d) S1 is non-inertial and S2 is inertial
The force exerted by the floor of an elevator on the foot of a person is more than the weight of the person if the elevator is
(a) going up and slowing down
(b) going up and speeding up
(c) going down and slowing down
(d) going down and speeding up
What do you mean by inertia of rest?
Give two examples of the following:
Inertia of rest
Two blocks A and B of masses m and 2 m, respectively, are held at rest such that the spring is in natural length. Find out the accelerations of both the blocks just after release.

Match the following.
| Column I | Column II |
| a. Newton’s I law | propulsion of a rocket |
| b. Newton’s II law | Stable equilibrium of the body |
| c. Newton’s III law | Law of force |
| d. Law of conservation of Linear momentum | Flying nature of bird |
What is the significance of Newton’s first law?
If the net force on an object is zero, what happens?
When does an object accelerate?
