BASIC
What is a force?
A push and a pull
What is the net force when 10 N acts left and 10 N acts right?
0 N
Which force pulls objects toward Earth?
Gravity.
What quantity tells us how fast an object is moving?
Speed
What is pressure?
What unit is force measured in?
Newtons (N)
Are balanced forces equal or unequal?
Equal.
Which force opposes motion between two surfaces touching?
Friction.
A cyclist travels 60 m in 12 s. What is their speed?
5 m/s
Does pressure increase or decrease as you go deeper underwater?
Increases
Which of Newton's Laws states that an object will remain at rest or in motion unless acted upon by an unbalanced force?
Newton's First Law (Law of Inertia)
A box is pushed with 20 N right and 5 N left. What is the net force?
15 N right.
Which force slows a skydiver as they fall?
Air resistance.
A runner moves at 4 m/s for 25 s. How far do they travel?
100 m
Why does a sharp knife cut better than a blunt knife?
Smaller area create greater pressure
Which of Newton's Laws states that for every action there is an equal and opposite reaction?
Newton's Third Law
What happens when forces are balanced?
No change in motion (object stays still or continues at constant speed).
What upward force acts on objects in water?
Buoyancy (upthrust).
A car travels 150 m at a speed of 10 m/s. How long does it take?
15 s
Why is air 'thinner' at higher altitude?
Which of Newton's Laws explains why a heavier object needs more force to accelerate than a lighter object?
Newton's Second Law
A car experiences 60 N forward force and 45 N backward force. Calculate the net force.
15 N forward.
Explain why a basketball eventually stops rolling across the court. Name the force responsible.
Friction
A train travels 360 km in 4 hours. Calculate its speed.
90 km/h
Why do divers feel more pressure at 20 m depth than at 5 m depth?
There is more water above them, creating greater pressure.