Lab Safety
If you spill water on the floor during a lab, what should you do?
Tell the teacher and clean it up immediately
What is the formula for speed?
Speed = Distance ÷ Time
A ball speeds up as it rolls down a hill. What is this change in motion called?
Acceleration
A push or a pull is called a __________.
Force
An object at rest will stay at rest unless acted on by a force. Which law is this?
Newton’s 1st Law
Why should you never eat or drink in the science lab?
Chemicals and substances could contaminate your food/drink
What is velocity?
Speed in a specific direction
What is acceleration?
The rate of change of velocity
What is the unit of force?
Newton (N)
Which law explains why you move backward when you jump off a small boat?
Newton’s 3rd Law (action/reaction)
Why should you tie back long hair during labs?
To prevent it from catching fire or getting into chemicals
A car goes 100 km in 2 hours. What is its average speed?
50 km/h
A soccer ball is kicked with 30 N of force. If its mass is 3 kg, what is its acceleration?
10 m/s²
If two people pull on a rope with equal force in opposite directions, what type of forces are acting?
Balanced forces
A 20 N force pulls a 5 kg object. What is the acceleration?
4 m/s² (F = ma → 20 ÷ 5)
If your lab partner gets a chemical in their eyes, what should you do immediately?
Guide them to the eyewash station and rinse for 15 minutes
A roller coaster goes 20 m/s east and then 20 m/s west. Did its velocity change? Why?
Yes, because direction changed
A runner increases her velocity from 4 m/s to 12 m/s in 2 seconds. What is her acceleration?
4 m/s²
Explain inertia in your own words.
The tendency of an object to resist a change in motion
A baseball bat hits a ball with 100 N of force. How much force does the ball exert back on the bat?
100 N (equal and opposite reaction)
Why is it important to know the location of fire extinguishers and safety showers?
To act quickly in case of an emergency
A car travels 100 m east in 5 seconds, then 100 m west in 5 seconds. What is its average velocity for the trip?
0 m/s (because displacement = 0)
A car slows down from 30 m/s to 10 m/s in 5 seconds. What is its acceleration?
–4 m/s² (negative acceleration/deceleration)
A 1,000 kg car accelerates at 3 m/s². What net force is needed?
Answer: 3,000 N
If you double the force on an object but keep its mass the same, what happens to acceleration?
It doubles