Force basics
What is the unit of force?
Newton (N)
What is another name for Newton's First Law?
Law of Inertia
What equation links force, mass and acceleration?
F = ma
What force opposes motion between surfaces?
Friction
What is the closest star to Earth?
Sun
Is force a scalar or vector quantity?
Vector
Which object has greater inertia: a basketball or a bowling ball?
Bowling Ball
If force increases and mass stays constant, what happens to acceleration?
Increases
What force slows a parachutist as they fall?
Air Resistance
Which planet is known as the Red Planet?
Mars
What is the force that pulls objects towards Earth?
Gravity
What causes an object’s motion to change according to Newton’s First Law?
An unbalanced force
What is the acceleration of a 2 kg object pushed with a force of 10 N? (Include units)
5m/s2
Why do seatbelts work according to Newton's First Law?
Inertia
What force keeps planets in orbit around the Sun?
Gravity
What is the net force if 10 N acts right and 4 N acts left?
6 N right
What property causes objects to resist changes in motion?
Inertia
What force is needed to accelerate a 4 kg object at 3 m/s²? (Include units)
12N
Why is it harder to accelerate a loaded truck than an empty truck?
Greater mass
What is the name of our galaxy?
Milky Way
What force keeps a book from falling through a table?
Normal Force
What is the resultant force on an object travelling at a constant velocity?
According to Newton's Second Law, acceleration is directly proportional to what?
Force
What force slows down a moving car when the brakes are applied?
Friction
Which planet has the most moons?