Forces in Physics

What is a force?

• A push or pull that can change the shape of an object, or change it's speed

• A measure of how heavy something is

• A type of energy

• The speed of an object

Which of the following is a contact force?

• Magnetic force

• Gravitational force

• Friction

• Electric force

Which of the following is a non-contact force?

• Tension

• Air resistance

• Gravitational force

• Normal contact force

What is the weight of an object a measure of?

• The amount of matter in the object

• The force of gravity acting on the object

• The object's volume

• The object's surface area

What is the difference between mass and weight?

• Mass is measured in kilograms and weight in newtons

• There is no difference; they are the same thing

• Weight is measured in kilograms and mass in newtons

• Mass is a force, while weight is not

Which unit is used to measure force?

• Kilogram

• Meter

• Newton

• Joule

What type of force is friction?

• A magnetic force

• A gravitational force

• A contact force

• A non-contact force

What is the role of friction in motion?

• It always speeds up moving objects

• It has no effect on moving objects

• It always slows down moving objects

• It can either speed up or slow down moving objects, depending on the situation

What is air resistance?

• A type of friction between air and the surface of a moving object

• The gravitational pull on an object by the Earth

• A magnetic force in the air

• A force that increases the speed of falling objects

What happens to the weight of an object if its mass doubles?

• It halves

• It stays the same

• It doubles

• It quadruples