A Levels Physics Problems Notes Questions with Answers PDF Download - 11

If a student drops a stone from a cliff of height 30 m and the time it takes to reach the ground is 2.6 s, then the acceleration due to gravity is

1. 9 ms^-2
2. 10 ms^-2
3. 4 ms^-2
4. 8.8 ms^-2

Sum of EMF around any loop equals

1. sum of current
2. sum of potential difference
3. sum of resistances
4. sum of charges passing through it per second

In order to keep a body moving in a circle, there exists a force on it that is directed toward the center of the circle. This force is known as

1. Centrifugal force
2. Centripetal force
3. Gravitational Force
4. magnetic force

Wavelength of slow moving neutrons is about

1. 10^-34 m
2. 10^-20 m
3. 10^-19 m
4. 10^-10 m

A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If the atmospheric pressure is assumed to be 100 kPa and thickness of the tank walls is assumed to be negligible, the force exerted by the atmosphere on the surface of water is

1. 20 kN
2. 50 kN
3. 100 kN
4. 200 kN