Forces and Laws...

If $$120 N $$ of force is acting on a body with $$6 ms^{-2}$$ acceleration, Its mass is _____________. 

A force produces an acceleration of $$5.0 \:cm \:s^{-2}$$ when it acts on a body of mass 20 g. Find the force acting on the body.

A bullet of mass $$50$$ gram is fired from a $$5kg$$ gun with a velocity of $$1km/s$$, the speed of recoil of the gun is

In CID serial (on TV ), Abhijeet fires a bullet of mass 100g with a speed of 100 $${ ms }^{ -1 }$$ on a soft plywood of thickness 4 cm. The bullet emerges with 10% of its intial KE. Find the emergent speed of the bullet.

A bullet is of mass $$5g$$ is fired at a velocity $$900m{s}^{-1}$$ from a rifle of mass $$2.5kg$$. What is the recoil velocity of the rifle?

A bomb of mass $$16kg$$ at rest explodes into two pieces of masses $$4kg$$ and $$12kg$$. The velocity of the $$12kg$$ mass is $$4m{s}^{-1}$$. The kinetic energy of the other mass is

If the action and reaction forces are always equal in magnitude, then these forces

A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table, the ball
I. Remains stationary if there is no friction between the paper and the ball.
II. Moves to the left and starts rolling backwards, i.e. to the left if there is a friction between the paper and the ball.
III. Moves forward, i.e., in the direction in which the paper is pulled.
Here, the correct statements is/ are

A target of mass $$M$$ is moving with a velocity $$u$$. Lead shots, each of mass $$m$$, are fired on it in the opposite direction with a velocity $$v$$. Find the number of bullets required to stop the target.

Which of the following cannot be explained using Newton's third law of motion?