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Some Old Guys
Newton's 1st Law
Newton's Second Law
Newton's 3rd Law
calculations
100
He discovered the 3 laws of Motion
Who is Sir Isaac Newton
100
The first law of motion states:
An object at rest stays at rest. An object in motion stays in motion.
100
True of False: Force is inversely proportional to an object's mass.
False.
100
Newton's 3rd Law states:
For every action, there is an equal and opposite reaction.
100
How much would 2 kg ball weigh on Earth (gravity is 10 m/s/s)
F=ma, 2kg*10m/s/s = 20 N
200
This scientist discovered that the Earth revolves around the sun.
Who is Copernicus
200
This is another name for Newton's First Law of Motion
What is the law of inertia.
200
What is the net force of an object? Is the object in equilibrium?
What is zero.
200
What is the reaction force of a rocket pushing gas?
The gas pushes the rocket.
200
If a box is moving forward at a force of 50 N with constant velocity, how much friction does the box feel?
50 N. The box is in dynamic equilibrium and the friction is the same as the applied force.
300
This scientist was one of the first to build a telescope.
Who is Galileo Galilei
300
True of False: If a ball with a mass of 1 kg weighed 10 N (2.2 lbs) on Earth, it would weigh the same on Jupiter.
False. Although the mass would be the same, the weight would change due to a change in the acceleration due to gravity.
300
What conditions affect friction?
The area of contact and the material.
300
If the Earth exerts a force on the moon, does the moon exert a force on the Earth?
Yes, the forces are equal.
300
If a 2 kg ball is rolling down a hill, and the force of friction is 10 N, what is the ball's acceleration?
The net force is 10 N. The acceleration is 5 m/s/s
400
Galileo stated this about friction.
Only when friction is present, a constant force is needed to keep an object moving.
400
What is the purpose of car seat belts?
When a car suddenly stops, any passenger will keep moving forward due to inertia. Seat belts prevent passengers from moving too far forward.
400
If a teacher with a mass of 60 kg sits on a bed of nails with an area of 5 square meters, will they get hurt? Why?
No, as long as the area is large. If the area gets smaller, the pressure will increase.
400
What causes lift in a helicopter?
The blades push air down (action), and the air pushes the blades up (reaction)
400
How much pressure is exerted if a 60 kg science teacher sits on a 1 square meter bed of nails.
P=F/A. F= 600 N. P = 600/1=600 Pa
500
What is 'violent motion' according to Aristotle.
Imposed motion which was the force that kept objects in motion.
500
If someone, while standing on a moving train, drops a pen, where would it land?
By the person's feet. The pen is moving at the same speed as the train, as well as the same speed as the person since no external force pushes the pen forward or backward.
500
If a bowling ball and a golf ball are dropped at the same time, why does the bowling ball fall to the ground faster?
Because the golf ball has a smaller mass, it reaches terminal velocity faster than the bowling ball.
500
Philip and Aliya are playing tug-o-war but are not moving anywhere. Jade decides to help Aliya and is successful. What is the system and what is the external force?
The system is Philip and Aliya. Jade is the external force.
500
What is the acceleration of a 60 kg skydiver who feels 700 N of air resistance?
What is - 1.6 m/s/s