Physics Past Questions and Answers

A solid of mass \(1 kg\) suspended by a string, is completely immersed in water. If the tension in the string is \(5 N\).
calculate the upthrust on the solid Take \(g =9.78 m / s 2\)

The resistance of a piece of wire of length \(20 m\), cross-sectional area \(8.0 \times 10-6 m 2\) and resistivity 4.0x10-7. [a-m is:

A force of \(0.6 N\) acts on a body of mass \(40 kg\), initially at rest. What is the resulting acceleration?

An object of mass \(10 kg\) is pulled over a rough surface by a \(20 N\) force. The object accelerates at a rate of \(1.5 m / s 2\).
Determine the frictional force between the object and the surface.

A body of mass \(2 kg\), moving with velocity \(5 m / s\) collides with stationary body of mass \(0.5 kg\) if the two bodies move together after impact.
Calculate their common velocity.