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This is an MCQ-based quiz on the topic of Motion: Friction and pulleys quiz.
This includes the following:-
Direction of Friction
Angle of Friction
Normal Force
Effect of Mass
Gravity
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
1.16
1.33
0.85
2.36
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. 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?
200N
210N
300N
260N
Friction can reduce the efficiency of cars upto ____ percent.
20
100
50
40
If a book is moving towards the left, friction will act towards
Down
Up
Right
Left
It always opposes motion between two surfaces in contact
Mass
Gravity
Friction
Distance
The amount of friction depends on the weight of the objects pressing together.
True
False
How does friction affect speed?
Increase the speed
Decrease the speed
None of the above
A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate
Surface area
Air resistance
Descent velocity
Gravity
Sally sliding down the slide would be an example of which type of friction?
Rolling
Sliding
Fluid
Static
Oil between machine parts would be an example of which type of friction?
Static
Sliding
Fluid
Rolling
