Physics Past Questions and Answers

A load of \(50 N\) is attached to one end of a long vertical wire of length \(4 m\) and diameter \(2.4 mm\) whose other end is fixed If the extension is \(0.25\) \(mm\). calculate the Young modulus of the material of the wire.

Which of the following statements is not true about friction force is not correct.

A car travels with a constant velocity of \(45 km / h\) for \(10 s\).
What is the distance it covers in this time?

A body is projected vertically upwards with a velocity of \(9.78 m / s\).
How high does it travel before it comes to rest momentarily at the top of its motion?

Which of the following statements is not true about the friction force?