Question 1 :
A machine gun fires $n$ bullets per second and the mass of each bullet is $m$. If the speed of bullets is $v$, then the force exerted on the machine gun is
Question 2 :
<span>On a stationary sail boat, air is blown from a fan attached to the boat. The boat</span>
Question 3 :
<div>Newton's third law of motion is often summarised as 'Every action (force) has an equal and opposite reaction;.</div><div>A book rests on a table</div><div>If the weight of the book is the 'action' force what is the 'reaction' force?<br></div>
Question 5 :
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 6 :
Assertion: A given force applied in turn to a number of different masses may cause the same rate of change in momentum in each but not the same acceleration to all.
Reason: $\vec F=\frac {\vec d p}{dt}$ and $\vec a=\frac {\vec F}{m}$
Question 7 :
When a body is acted by a constant force, then which of the following quantities remain constant
Question 8 :
The force according to Newton's second law of motion is equal to
Question 9 :
Assertion: A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table.
Reason: For every action, there is an equal and opposite reaction.
Question 10 :
A large truck and a car, both moving with a velocity of magnitude $v$, have a head-on collision. If the collision lasts for $1\ s$ which vehicle experiences greater force of impact?<br/>
Question 12 :
A heavy uniform bar is being carried by two men on their shoulders. The weight of the bar is $w$. If one man lets it fall from the end carried by him, what will be the weight experienced by the other <span> person at the instant when the other man releases the bar</span>?<br/>
Question 13 :
A particle moves in the $xy-plane$ under the action of a force $F$ such that the components of its linear momentum $p$ at any time $t$ are $p_{x} = 2\cos t, p_{y} = 2\sin t$. The angle between $F$ and $p$ at time $t$ is
Question 14 :
Assertion: A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table.
Reason: For every action there is an equal and opposite reaction.