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Newton's Laws of Motion

Newton's Laws of Motion
Created by Quizmagic Team on Aug 06, 2013 05:38 PM
Newton’s laws of motion are the basic foundation of the Statics and Dynamics branches of mechanics. Newton’s laws of motion are a set of three mutually exclusive laws that explain why a body is at rest or in motion. 
1. First Law - Force and Inertia: This law explains the effect of force on state of rest or uniform motion of a body.
2. Second Law - Momentum (F=ma): This law quantitatively explains force, which is defined by the first law. 
3. Third Law  - Action-Reaction: This law talks about action and reaction.

Newton’s laws of motion provide a quantitative explanation for the motion of bodies in day-to-day life. You may find a varied range where these laws can be applied to. Following is a list of some of these areas: 
- Motion on an inclined plane 
- Projectile motion 
- Motion of spinning bodies 
- Motion of a pendulum 
- Motion of bodies in fluids
- Motion of moon and the planets 

Try this quiz to learn and test your knowledge of the Newton's laws of Motion.
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Sample Questions

Question 1
A ball of mass ‘m’ is hanging from point ‘O’ by a light rope of length ‘L’ inside a liquid of density ‘P’. If the beaker is moved with an acceleration of 5 m/s2, what will happen to the level of the liquid AB?
The level will decrease while in motion.
The level will increase while in motion.
The level will remain constant.
Question 2
The ratio of weight of a man while the lift is stationary to the weight when the lift is moving with constant acceleration is 3: 2. What is the magnitude and direction of acceleration of the lift?
Magnitude = g, Direction=downwards
Magnitude=g/2, Direction=downwards
Magnitude = 2g, Direction=downwards
Magnitude = g/3, Direction=downwards
Question 3
Three masses m1, m2, and m3 are hanging vertically over a frictionless pulley as shown in figure.
If m1 = m2 = m3 = m, calculate the tensions T1,T2, and the acceleration of the system.
Question 4
Which of the following statements are not true for Newton's second law?
It provides the relation between force, velocity, and time.
It provides the relation between force and momentum.
It provides the measure of inertia.
It provides the measure of force.
Question 5
In the following figure, the blocks A, B, and C of mass m each have accelerations a1, a2, and a3 respectively. F1 and F2 are external forces of magnitudes 2 mg and mg respectively. What is the relation between the accelerations (a1: a2:a3) of the three blocks?
Acceleration of all the three blocks will be same.
Question 6
Blocks A and B having masses 2 kg and 3 kg respectively, are kept on a smooth surface. An external force, P of 10 N is applied. Calculate the force exerted by block B on block A.
8 N
6 N
4 N
10 N
Question 7
A man of mass m stands on a frame of mass M. He pulls the light rope, which passes over a pulley. The other end of the rope is attached to the frame. For the system to be in equilibrium, what force must the man exert on the rope?
(M + m) g
(M - m) g
(M + 2 m) g
(M + m) g
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