SCIENCE 8 FORCE AND MOTION (PRE-TEST)

Which of the following describes a force?

• A pull only

• A push only

• A push or pull or both

• Neither a push nor a pull

How do forces occur?

• in pairs

• in triplets

• by themselves

• as single quantity

What refers to how large or strong is the force?

• magnitude

• line of action

• velocity of the object

• direction of the force

What force is always directed opposite to the motion of an object?

• Friction

• Gravitational

• Magnetic

• Tension

Two people pull on a rope in a tug-of-war. Each pull with a 300 N force. What is the net force?

• 0 N

• 300 N

• 600 N

• 900 N

What is the unit of force in metric system?

• Calorie

• Joules

• Newtons

• Pounds

A 500 N lady sits on the floor. How much force the floor exerts on her?

• 50 N

• 250 N

• 500 N

• 1000 N

A leaf falls from a tree. What force(s) are acting on it?

• Air resistance only

• Gravitational force only

• Applied force and air resistance

• Air resistance and gravitational forces

What is the net force in the figure below?

• 1 N, to the left

• 1 N, to the right

• 11 N, to the left

• 11 N, to the right

What is the net force in the given figure?

• 25 N, to the left

• 25 N, to the right

• 195 N, to the left

• 195 N, to the right