Priyanka B Solutions for Chapter: Sample Paper 4, Exercise 1: Sample Paper

Explain why a truck or a motor bus has much wider tyres?

Why do we feel lighter when we swim?

What happens when buoyant force exerted by the fluid is less than the weight of body?

Differentiate between '$g$' and '$G$'?

The weight of a person on the moon is about $1/6$ times that on the earth. He can lift a mass of $15 \mathrm{kg}$ on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?
 

In an experimental set-up used to study limiting friction, a student observes that the block starts to move after adding $6 \mathrm{g}$ to the pan. The mass of the pan is $20 \mathrm{g}$. What is the limiting friction in newton?

In an experimental set-up used to study limiting friction a student observes that the block starts to move after adding $6 \mathrm{g}$ to the pan. The mass of the pan is $20 \mathrm{g}$. What would be the limiting friction when an identical block of the same mass is placed on the first block?

A strong pulse is created at one end of slinky and the watch is started. As the pulse reaches the other end of slinky which is 10 m long, the stopwatch is stopped and its reading is as shown. Find the least count of the stopwatch and the velocity of pulse.