Understanding Forces

What is the unit of force in physics?

• Joules

• Pounds

• Newtons

• Kilograms

Which of the following is a type of contact force?

• Gravity

• Electric force

• Normal force

• Magnetic force

What happens to the applied force when contact is lost?

• It remains constant

• It disappears

• It decreases

• It increases

Which force is responsible for the resistance felt when sliding an object?

• Normal force

• Friction

• Gravity

• Electric force

Which of the following is NOT a non-contact force?

• Friction

• Gravity

• Magnetic force

• Electric force

What force causes planets to orbit the sun?

• Magnetic force

• Electric force

• Gravitational force

• Normal force

What is the net force if two forces of 10 N and 14 N act in the same direction?

• 0 N

• 4 N

• 24 N

• 14 N

If two forces of equal magnitude act in opposite directions, what is the net force?

• Half the force

• Zero

• Double the force

• Equal to one of the forces

How do you determine the net force when forces act in both horizontal and vertical directions?

• Ignore one direction

• Analyze them separately

• Subtract them

• Add them together

What is the net force if horizontal forces are 4 N to the left and vertical forces are balanced?

• 4 N to the right

• 4 N to the left

• 0 N

• 8 N