Science Tools
Force
Friction
Fill in the blank
Surprise me!
100
What tool did we use to measure the force of a push or pull?
A spring scale
100
A push or a pull
Force
100
When a ball rolls down a ramp and then to a flat surface, it eventually stops. What force stops the ball from rolling?
Friction
100
It takes ________________force to move an object with more mass.
more
100
What would happen if you tried to move across the room and there was no friction?
You would not be able to move across the room.
200
What are the two scales marked on a spring scale?
Newtons and grams.
200
True or false: only two forces can act on an object at one time.
False, multiple forces can act on an object.
200
What is the force that acts between the surfaces of objects?
Friction
200
When force sets an object in motion, the object has _____________ energy
Kinetic
200
What is the standard unit for measuring force in the metric system?
A Newton
300
What is a Newton?
A Newton is a unit to measure force.
300
What forces are acting on the plants sitting on the lab table? How do the forces compare?
Gravity is pushing down and the table is pushing up with equal force.
300
A rougher surface creates _______________ than a smooth surface.
more friction
300
If team A and team B play tug of war, team A pulls with 1,800 N of force and team B pulls with 2,000 N of force, what is the net force
200 N in the direction of team B.
300
Which situation results in 0 net force? A) Two people pushing equally on the same side of a couch moving across the floor B) Two people pushing a couch equally from opposite sides
B- two people pushing equally from opposite sides.
400
What is the downward force of gravity on a mass called?
Weight
400
If you push against a wall with 500 N of force and the wall does not move, how much force is the wall pushing back with?
500 N
400
Rougher surfaces create more friction, so _____________ force is needed to move something over the rougher surface.
More
400
What is a change to an objects speed?
Acceleration
400
Which scientist, who observed an apple falling from a tree, was the first to explain that the force of gravity is attraction between two masses?
Sir Issac Newton
500
Why is it called a spring scale and how does it work?
A spring is compressed when force is applied.
500
Aristotle had ideas developed from thought experiments about force that people believed for more than 2,000 years. In the 1600s, Galileo conducted investigations with objects and presented new ideas about force. Which great thinker had better evidence to support his claims?
Galileo: he conducted experiments using a ball and ramp to support his ideas.
500
In order to move a carton of books across table A, a student had to push with 15 N of force. In order to move a carton of books with the same mass across table B, the student had to push with 25 N of force. Which table has a smoother surface? Table A or B?
Table A
500
Name three scientists that helped us understand the movement of objects on Earth
Aristotle, Galileo and Newton
500
Give three examples of how forces and friction are used on a bicycle.
Force is applied to the pedal, which is transferred to the gear, then to the chain, then to the wheel. Friction is used in the brakes, keeps the rider on the seat, and helps him/her hold the handle bars. It also keeps the wheels from sliding.
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