set 3 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on mechanics (mass, force, acceleration, work, energy, momentum, velocity) topic of general science mcq
(a) 5
(b) 4
(c) 3
(d) 6
The correct answers to the above question in:
Answer: (d)
Practice mechanics (mass, force, acceleration, work, energy, momentum, velocity) (set 3) Online Quiz
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Read more mechanics work and energy Based General Science Questions and Answers
Question : 1
Consider the following statements :
- Action and reaction act on the same body.
- Volume is a measure of the inertia of a body.
a) 1 and 2 both
b) 1 only
c) 2 only
d) None
Answer »Answer: (d)
Action and reaction act on different bodies. If a body does a force on another body, the second body will exert a force with the same magnitude and opposite direction on the first body.
Mass is a measure of the inertia of a body.
Question : 2
Thomas and Mary are playing carom board. They arrange the seeds in the vertical order. Thomas strikes on the seeds with the striker, with a great speed. He finds that, the stakes do not fall down. On the other hand, when he strikes the seeds with less speed, all the seeds of the stakes fell down. Which property of force this shows?
a) Inertia
b) Motion
c) Newton’s third law
d) Reaction of force
Answer »Answer: (a)
Question : 3
When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained by
a) Newton’s second law
b) Newton’s first law
c) the theory of relativity
d) Newton’s third law
Answer »Answer: (b)
Question : 4
On the basis of following features identify the correct option. A. It is measured in units of kg m/s. B. Its direction is same as that of velocity of body.
a) Both A and B
b) Inertia
c) Momentum
d) Neither A and B
Answer »Answer: (c)
Question : 5
A ball is dropped from a satellite revolving round the earth at a height of 120 km. The ball will
a) fall down to earth gradually
b) continue to move with the same speed along the original orbit of satellite.
c) continue to move with same speed along a straight line tangentially to the satellite at that time.
d) go far away in space
Answer »Answer: (b)
The orbital speed of satellite is independent of mass of satellite, so the ball will behave as a satellite and will continue to move with the same speed in the original orbit.
Question : 6
Which of the following is NOT an illustration of Newton's third law ?
a) Walking on floor
b) A cricket player lowering his hands while catching a cricket ball
c) Flight of a jet plane
d) Rebounding of a rubber ball
Answer »Answer: (b)
A cricketer lower his hands while catching a ball to increase the time so as to decrease the force exerted by the ball on cricketer's hands. This is not an example of Newton's third law of motion.
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