AIEEE 2004 (Physics) Mock Test

Which of the following statements is false for a particle moving in a circle with a constant angular speed?

An automobile travelling with speed of $60\text{km/h}$, can brake to stop within a distance of $20\text{m}$. If the car is going twice as fast, i.e $120\text{km/h}$, the stopping distance will be:

A machine gun fires a bullet of mass $40\text{g}$ with a velocity $1200\text{m/s}$. The man holding it can exert a maximum force of $144\text{N}$ on the gun. How many bullets can he fire per second at the most?

Two masses $m_1=5\text{kg}$ and $m_2=4.8\text{kg}$ tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when left free to move? (Take $g=9.8{\text{m/s}}^2$)

A uniform chain of length $2\text{m}$ is kept on a table such that a length of $60\text{cm}$ hangs freely from the edge of the table. The total mass of the chain is $4\text{kg}$. What is the work done in pulling the entire chain on the table?