Forces - Basic concepts and calculations- IGCSE Physics

Who wins the tug of war with what net force?

• The person on the left with 20 N
• The person on the left with 80 N
• The people on the right with 20 N
• The people on the right with 100 N

What is the net force?

• 3 N

• 3 N, right

• 17 N, right

• 3 N, left

What is the unit to MEASURE force?

• Kilogram

• Meter

• Pounds

• Newton

If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Calculate the Net Force. 

• 60N, Left 
• 40N, Right 
• 0N
• 60N, Right

What force holds the planets in motion around the sun?

• Magnetic
• Electrical
• Gravitational
• Air Resistance

Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 

• That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
• That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
• That Jupiter’s and Earth’s gravitational forces are equal.
• Mass has no effect on the gravitational force between two objects

This type of force resist motion between two surfaces that are pressed together

• contact
• gravity
• friction

If both forces are going in the same direction you should______ those forces

• Add

• Subtract

• Divide

• Multiply

When forces are going in the opposite direction of each other you should do what do find the net force

• Subtract

• Add

• Divide

• Multiply