Describe the speed in this distance time graph
Stationary, Not moving
How far did the car travel in this chart? (distance)
100km
State the equipment to measure forces
Newton Meter
State the unit to measure forces
Newtons (N)
What will happen to the box?
Move to the right
When a car is slowing down, the thrust is _________ than the drag
less than
When a car is moving at a steady speed, the thrust is _________ to the drag
equal to
When a car is accelerating, the thrust is _________ than the drag
more than
The point where the extension of the spring no longer increases proportionally to the weight.
Elastic limit
Name of the physics law related to springs
Hooke's Law
A spring is 2cm long, after hanging a 2N weight, it becomes 3.5cm long. How long is the spring if a 4N weight is hung on?
5cm (2cm+3cm)
A spring is 2cm long, after hanging a 2N weight, it becomes 3.5cm long. What is the extension of the spring
1.5cm
A balloon is squeezed, what happens to the air pressure?
It increases
In a cool morning, the balloon becomes smaller, what happened to the air pressure in the balloon in the cool weather?
Decreases
Explain how a balloon maintains its shape.
Air particles are colliding with the balloon wall
Why do we need to convert mass into weight?
Weight is mass interaction with gravity, which is the accurate force the mass exerts
