Forces and Motion
a force that acts on a box sitting on a table
What is gravity?
The force that opposes, or acts against, motion when two surfaces rub up against each other.
What is friction?
The formula for speed is...
distance divided by time. D/T
True or false: Data collected correctly does not need units included (example: The distance the block traveled was 12).
False- We always NEED to include units
stopwatch, clock
What measures time?
Two students push on a box with equal force. What happens to the box?
The box will not move.
the part of the experiment that can be changed
What is a variable?
It took a bus 5 hours to travel 300 miles. The average speed of the bus was..
60 miles per hour.
True or False: If a student has a large ball of slime and then flattens it into a circle, the slime's weight and mass will not change
True: Gravity still pulls down the same amount of force (same weight) and the amount of matter in the object stays the same (same mass).
meter stick
What tool measures distance?
multiple surfaces made of different materials, ball, and meter stick
What materials are needed to find the best surface to make a ball roll the farthest?
the force that keeps the Earth and Moon in orbit
What is gravity?
True or False: Friction decreases speed.
True.
What data point would come next if the pattern continues:
0.8m, 1.0m, 1.2m, 1.4m, _____
1.6m (the pattern shows increasing by 0.2m each time)
a tool that measures the force needed to move an object
What is a spring scale?
Which force causes a thrown ball to fall downward?
Gravity
measures the amount of force needed to pull an object.
What is a spring scale?
Name at least 3 things that could change an object's velocity.
What is speed it up, slow it down, stop it, or change it's direction.
When conducting an experiment, what should you do to get more accurate results (hint: Is just doing one trial for each measurement very accurate?)
We should conduct multiple trials (at least 3 trials would give more accurate results!)
a tool that attracts and repels
What is a magnet?
If you put a brick on the moon, what would happen to its mass and its weight?
Its mass would not change but its weight would decrease because the force of gravity is not as strong on the moon.
final process of the basic scientific method by which scientists reveal whether the hypothesis was proven correct
What is a conclusion?
It took the coach 10 minutes to travel each of the following distances. When was the coach moving the slowest?
Car to the locker room: 60ft
Locker room to the gym: 20ft
Gym to the office: 30ft
Locker room to the gym (moving 2ft/minute)
What is a constant in an experiment?
A condition that needs to be kept the same during all tests and trials.
a safety tool that protects your eyes during scientific investigations
What are safety goggles?