Motion Madness
What is the formula for speed?
Speed = Distance ÷ Time
What unit is force measured in?
Newtons (N)
State Newton’s 1st Law of Motion.
An object will remain at rest or move in a straight line at constant speed unless acted on by an outside force.
State Newton’s 2nd Law of Motion.
Force = Mass × Acceleration (F = ma).
State Newton’s 3rd Law of Motion.
For every action, there is an equal and opposite reaction.
If a car travels 120 km in 2 hours, what is its average speed?
60 km/h
Define friction.
A force that opposes motion between two surfaces in contact.
Why do passengers lurch forward in a car when it suddenly stops?
Their bodies tend to keep moving forward due to inertia.
What happens to acceleration if the same force is applied to an object with greater mass?
Acceleration decreases.
What is the reaction force when you push against a wall?
The wall pushes back with equal force.
What is the difference between speed and velocity?
Speed is how fast something moves; velocity includes both speed and direction.
Give an example of balanced forces in action.
book resting on a table (gravity pulls down, the table pushes up with equal force).
Give an example of an object continuing in motion until acted on by a force.
A hockey puck sliding on ice until friction or a player stops it.
Calculate the force: a 5 kg object accelerates at 3 m/s².
15 N
Why does a balloon fly around when the air rushes out?
The air pushes backward, and the balloon moves forward.
A runner goes 400 m north, then 300 m south. What is the total displacement?
100 m north
How is weight different from mass?
Mass is the amount of matter in an object; weight is the force of gravity acting on that mass.
Why does a rolling soccer ball eventually stop?
Friction and air resistance slow it down.
If a force of 100 N acts on a 20 kg mass, what is its acceleration?
5 m/s²
Explain how rockets launch using Newton’s 3rd Law.
The rocket pushes gases downward, and the gases push the rocket upward.
Explain acceleration in terms of velocity and time.
Acceleration is the change in velocity per unit of time.
A box has a mass of 10 kg. If gravity = 9.8 m/s², what is its weight?
98 N
How does wearing a seatbelt relate to Newton’s 1st Law?
The seatbelt provides the outside force needed to stop passengers when the car suddenly stops.
Explain how Newton’s 2nd Law applies to pushing a shopping cart.
The harder you push (more force), the faster the cart accelerates; a heavier cart (more mass) is harder to accelerate.
A swimmer pushes the water backward. What force moves the swimmer forward?
The water pushes the swimmer forward with equal and opposite force.