Motion

A stone is dropped from the top of a tower of height h. After 1s another stone is dropped from 20m below the top. Both reach bottom together. Height h is (g=10):

A body is projected vertically upwards with a velocity u. It passes a point at height h at times t1 and t2. The sum t1+t2 is:

If a body is moving in a circle with constant speed, the work done by centripetal force is:

A car travels 1/3 distance with 10 km/h, 1/3 with 20 km/h and 1/3 with 60 km/h. Average speed is:

A body is moving with constant acceleration. If it travels 10m in 2s and 30m in next 2s, what is the initial velocity?

What is the displacement of a point on the rim of a wheel of radius R when the wheel rolls forward half a revolution?

A balloon is at a height of 81m and is ascending with a velocity of 12 m/s. A body is dropped from it. If g=10, the body reaches ground in:

A particle has an initial velocity of 3i + 4j and an acceleration of 0.4i + 0.3j. Its speed after 10s is:

Which of the following physical quantities is a scalar quantity?

What is the SI unit of acceleration?

The shortest distance between the initial and final position of a moving body is known as:

If an object moves in a circular path with constant speed, its motion is called:

A body at rest is said to have a velocity of:

The rate of change of displacement is called:

Negative acceleration is also known as:

Identify the formula for the third equation of motion.

An object covers equal distances in equal intervals of time. This is called:

Which instrument is used to measure the instantaneous speed of a vehicle?

In a distance-time graph, a straight line parallel to the time axis indicates:

Which of these represents acceleration?