Advertisements
Advertisements
Question
Give qualitative definition of force on the basic of Newton's first law of motion.
Advertisements
Solution 1
Force is that external cause which can move a stationary object or which can stop a moving object.
Solution 2
According to Newton's first law force is that external agency which tends to change the state of rest or the state of motion of a body.
RELATED QUESTIONS
Give the magnitude and direction of the net force acting on a drop of rain falling down with a constant speed.
State Newton’s first law of motion. Give two examples to illustrate Newton’s first law of motion.
The figure shows a light spring balance connected to two blocks of mass 20 kg each. The graduations in the balance measure the tension in the spring. (a) What is the reading of the balance? (b) Will the reading change if the balance is heavy, say 2.0 kg? (c) What will happen if the spring is light but the blocks have unequal masses?

A block of mass 2 kg placed on a long frictionless horizontal table is pulled horizontally by a constant force F. It is found to move 10 m in the first seconds. Find the magnitude of F.
When a train starts, the head of a standing passenger seems to be pushed backward. Analyse the situation from the ground frame. Does it really go backward? Coming back to the train frame, how do you explain the backward movement of the head on the basis of Newton's laws?
The amount of inertia of a body depends on its _________.
What do you mean by inertia of rest?
In the above given problem if the lower thread is pulled with a jerk, what happens?
A smooth sphere of radius R and mass M is placed on the smooth horizontal floor. Another smooth particle of mass m is placed on the sphere and a horizontal force F is applied on the sphere as shown. If the particle does not slip on the sphere then the value of force F is ______.

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 |
