NEET Questions

A book rests on a table. The reaction force to the weight of the book is:

Two bodies of masses $m_1$ and $m_2$ moving with velocities $u_1$ and $u_2$ respectively collide head-on elastically. After the collision, they move with velocities $v_1$ and $v_2$. Which of the following expressions is correct for the velocity of the center of mass?

A block of wood is placed on a horizontal wooden table. A horizontal force is applied to the block, gradually increasing until the block just starts to move. At this instant, which force is equal to the applied force?

If the time of impact is doubled, keeping the force constant, the impulse will be:

A body is projected vertically upwards. At its highest point:

A position-time graph for a particle moving along the x-axis is shown. At which point is the particle's speed the greatest?

Which of the following graphs correctly represents the velocity-time graph of a ball thrown vertically upwards and then returning to the thrower's hand?

An object is moving with uniform acceleration. Its velocity-time graph is represented by:

A block of mass $m$ rests on a horizontal surface. The coefficient of static friction between the block and the surface is $\mu_s$. A horizontal force $F$ is applied to the block. Which of the following statements is true about the frictional force acting on the block when $F < \mu_s mg$?

A car is moving on a horizontal road with a constant velocity. The coefficient of friction between the tires and the road is $\mu$. Which type of friction is acting between the tires and the road?