Forces in Engineering

Which of the following is NOT a fundamental force in engineering?

• Gravity

• Elasticity

• Magnetism

• Velocity

Which of the following is the characteristic of force?

• Magnitude of force

• Point of application of force

• Direction of application of force

• All of the mentioned

Which statement is not true?

• Forces can cause a stationary object to start moving, or change the velocity of a moving object

• Forces can change speed, direction or shape of an object

• Forces can change movement of objects only when they are already in motion

• A force can cause an object to accelerate, hold objects together, push objects apart, crush objectsobjects,

What happens to the frictional force when an object slides over a surface at a constant velocity?

• It decreases

• It increases

• It remains constant

• It becomes zero

In which situation is the frictional force likely to be the greatest?

• Sliding a book on a smooth surface

• Pushing a heavy box across a rough surface

• Rolling a ball on a flat, smooth track

• Dragging a bag on a carpeted floor

Which of the following is a feature of friction?

• Always acts in the direction opposite to the applied force

• It is an active force

• Always acts in the direction of applied force

• All of the mentioned

To reduce friction, one could--------.

• remove wheels to reduce the downward pressure in trolleys

• use a lubricant such as grease

• place extra weight on the object that is moving

• make the surfaces little more rougher

What force causes an object to accelerate towards the Earth's center?

Which force opposes the motion of an object sliding across a surface?

What force causes an object to bounce back after hitting a surface?

....................... force