Understanding Common Forces

What is the relationship between mass and gravitational force?

• Gravitational force is independent of mass.

• Gravitational force is inversely proportional to mass.

• Gravitational force decreases with more mass.

• Gravitational force increases with more mass.

How does the normal force act in relation to the surface it is on?

• At a 90-degree angle to the surface

• At a 45-degree angle to the surface

• In the same direction as gravity

• Parallel to the surface

What happens to the normal force if an additional downward force is applied to an object on a surface?

• The normal force becomes zero.

• The normal force increases.

• The normal force remains the same.

• The normal force decreases.

Which type of friction prevents an object from moving?

• Kinetic friction

• Rolling friction

• Fluid friction

• Static friction

What is the role of kinetic friction?

• To prevent an object from starting to move

• To increase the speed of a moving object

• To assist an object in moving faster

• To oppose the motion of a moving object

What is an applied force?

• A force exerted by a spring

• A direct push or pull from an object or person

• A force exerted by a surface

• A force exerted by a rope

How does tension in a rope behave?

• It only acts in one direction.

• It is equal and opposite on both ends of the rope.

• It is weaker at one end of the rope.

• It is stronger at one end of the rope.

What happens to a spring force when a spring is compressed or stretched?

• The force decreases.

• The force remains constant.

• The force increases.

• The force becomes zero.

What is terminal velocity?

• The speed at which gravity stops acting

• The speed at which air resistance is zero

• The speed at which an object starts to fall

• The maximum speed an object can reach when falling

How do parachutes help in reducing terminal velocity?

• By decreasing air resistance

• By increasing air resistance

• By increasing the force of gravity

• By decreasing the object's mass