Question 1 :
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is
Question 2 :
'The action and reaction are equal in magnitude'. Is this statement true and which law is related with it?
Question 5 :
Which of following Newton's laws reveals the underlying symmetry in the forces that occur in nature?
Question 6 :
A physical book rests on a table top. A gravitational force pulls down on the book.<br>According Newton's third law, the force that is equal to this gravitational force is
Question 7 :
During a planned man-oeuvre in a space flight, a free-floating astronaut $A$ pushes another free-floating astronaut $B$, the mass of $A$ being greater than that of $B$. Then, the magnitude of the force exerted by astronaut $A$ on astronaut $B$ is
Question 9 :
Which law is the special case ofNewton's second law of motion ?
Question 10 :
State whether given statement is True or False.<br/>Force never exists in pairs.
Question 11 :
Sir Isaac Newton's third law of motion is called the action-reaction law. Which of the following statements appropriately describes the action-reaction forces?
Question 13 :
A ball falls freely towards the Earth. If the action force is the Earth pulling down on the ball, then identify which of the following best describe the reaction force:<br/>
Question 14 :
State whether given statement is True or False.<br/>In the second law, $F=0$ implies $a=0$. The second law is obviously consistent with the first law<br/>
Question 15 :
Assertion (A): According to Newton’s third law sum of action and reaction is not equal to zero Reason (R) : The forces action and reaction acts on different bodies.
Question 16 :
In a game of tug of wars, a condition of equilibrium exists. Both the teams pull the rope with a force of 10$^4$ N. The tension in the rope is :<br>
Question 18 :
A pile of $11$ books weighing $2 N$ each is sitting on a table. With what total force does the table push back on the books?
Question 19 :
If you are asked to push an object so that the acceleration produced in it has to be twice as before, then the force required will be :
Question 20 :
In a game of tug of wars, a condition of equilibrium exists. Both the teams pull the rope with a force of $10^4 N$. Find the tension in the rope.
Question 22 :
Statement 1 : There can be displacement of an object even in the absence of any force acting on it.<br/>Statement 2 : An object in uniform motion in a straight line shows displacement even when the net force acting on it is zero.
Question 23 :
A box is put on a scale which is adjusted to read zero,when the box is empty. A stream of pebbles is then poured into the box from a height h above its bottom at a rate of n pebbles collide with the box such that they immediately come to rest after collision, the scale reading at time t after the pebbles begin to fill the box is :
Question 24 :
Assertion: There is no cause-effect relation between action and reaction.
Reason: Action and reaction forces are not simultaneous forces.
Question 25 :
A balloon of weight w is falling vertically downward with a constant acceleration a(<g).Th magnitude of the air resistance is:
Question 26 :
The velocity acquired by a mass $m$ in travelling a certain distance $d$ starting from rest under the action of a constant force is directly proportional to:
Question 27 :
A particle of mass $0.3 kg$ is subjected to a force $F=kx$ with $k=15\ N{ m }^{ -1 }$. What will be its initial acceleration if it is released from a point $20 cm$ away from the origin?<br>
Question 29 :
The earth and the moon are attracted to each other by gravitational force. Is the force with which the Earth attracts the Moon greater, smaller or the same as the force with which the Moon attracts the Earth?
Question 30 :
A girl of mass 50 kg standing on a rail road car of mass 75 kg moving with velocity 20 m/s. Now, the girl begins to run with velocity of 10 m/s with respect to the car in the same direction. as that of the car. Velocity of the car at this instant will be
Question 31 :
The engine of a car produces an acceleration of $6 \ m/s^2$ in the car. If this car pulls a block of the same mass, then the acceleration would be:
Question 32 :
Assertion: In some situations, friction facilitates the motion and in some situations, it oppose the motion.
Reason: Friction force always oppose the relative motion between surface in contact
Question 33 :
Assertion: Netwon's second law of motion is the main law of motion.
Reason: Newton's first and third law are contained in second law.
Question 34 :
Assertion: Newton's third law of motion is applicable only when bodies are in motion.
Reason: Newton's third law applies to all types of forces. e.g. gravitational, electric or magnetic force etc.,
Question 35 :
A force of $5N$ acts horizontallyon a body of weight $9.8N$. What is the acceleration produced (in ${ ms }^{ -2 }$)?<br>
Question 36 :
A ball$A$ is moving with velocity $5 m/s$ collides elastically with another identical ball $B$ which is initially at rest such that the velocity of $B$ after the collision makes an angle of $37^\circ $ with the initial velocity of $A$. Then the <b>INCORRECT</b>  statement is :
Question 38 :
A body of mass 5 kg moving with a speed of $ 3 ms^{-1}$collides head on with a body of mass 3 kg moving in the opposite direction at a speed of $2 ms^{-1}$. The first body stops after the collision. Find the final velocity of the second body.<br>
