Friction and its Effects MCQ (Multiple Choice Questions) PDF Download

It always opposes motion between two surfaces in contact

1. displacement
2. friction
3. tension
4. strain

If a book is moving towards the left, friction will act towards

1. down
2. up
3. right
4. left

A aircraft starts from rest and its propeller produces a forward force of 30000 N. The mass of the aircraft is 35000 kg. If there is no friction then the initial acceleration of the aircraft is

1. 1.16 ms^-2
2. 1.33 ms^-2
3. 0.85 ms^-2
4. 2.36 ms^-2

Friction can reduce the efficiency of cars upto

1. 20&percent;
2. 100&percent;
3. 50&percent;
4. 40&percent;

A truck engine having mass of 4000 kg is pulling a lorry of mass 1000 kg along a level of path at an acceleration of 0.25 ms^-2. The resistances are 8 N per 1000 kg for the truck engine and 10 N per 1000 kg for the lorry. What is the tension connecting two bar between the engine and the lorry?

1. 200 N
2. 210 N
3. 300 N
4. 260 N