First Law
An object will stay at rest or in motion unless acted upon by a ______ force.
Unbalanced
If you push harder on an object, what happens to its acceleration?
It increases
Every action has an equal and opposite ______.
Reaction
What law explains why seatbelts are important?
Newton’s First Law
Why does a ball eventually stop rolling on the ground?
Because of friction
What is the formula for Newtons' second law?
F = ma
When you jump, what do you push against?
The ground
Kicking a ball harder increases its ______.
Acceleration
Which has more inertia: a heavy object or a light object?
Heavy object
Which will accelerate faster: a light cart or a heavy cart (same force)?
Light cart
When you push a wall, what does the wall do?
Pushes back
A car accelerates faster when empty than when fully loaded. Which law explains this?
Newton’s Second Law
When a jeep suddenly moves, passengers move backward. Why?
Due to inertia
If mass increases, what happens to acceleration (same force)?
It decreases
Do action and reaction forces have the same size or different size?
Same size
A rocket moves upward by pushing gases ______.
Downward
If no forces act on a moving object, what will happen to its motion?
It will continue moving at constant speed
A 2 kg object is pushed with 4 N of force. What is its acceleration?
2 m/s²
A swimmer pushes water backward with a force of 50 N. What is the force exerted by the water on the swimmer?
50 N forward
Why do astronauts appear weightless in orbit even though gravity still acts on them?
They are in free fall