Question

1.You spill a bucket of soapy water on the marble floor accidently. Would it make it easier or more difficult for you to walk on the floor. Why? 2.Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it. 3. Air planes can move at a much greater speed than motor cars. Explain. Short Response 1. Which friction is largest friction? 2. What is the force responsible for wearing out of bicycles tyres? Short constructed 1. Give reasons for the following: i. Carpenters often grease their screws before fixing them. ii. Why do pieces of luggage fitted with rollers?

Answer 1

Answer:

1. it is difficult to walk because it becomes soft due to blocking of rough space .

2