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Newton's First Law
Newton's Second Law
More Newton
Experimental
100
State Newton's First Law
An object in motion (or at rest) will tend to stay in motion (or at rest) until it is acted upon by an outside force.
100
State Newton's Second Law of motion.
When an object is acted upon by one or more outside forces, the vector sum of those force is equal to the mass of the object times the resulting acceleration vector. F=ma.
100
State Newton's Third Law of motion
For every action, there is an equal and opposite reaction.
100
Experiment 5.1 helped us to visualize what property of matter?
Inertia
200
The tendency of an object to stay at rest (or in motion) is called _________.
Inertia
200
A student applies the same force to two objects. If the first is 1,000 times more massive than the second, which accelerates more quickly? How much more quickly?
The less massive object will accelerate 1,000 times faster then the more massive object.
200
A physics student measures an object and writes down a value of 13.1 Newtons. What was the student measuring: the object's mass or its weight?
The student was measuring weight, because that is the quantity with the unit Newtons.
200
In Experiment 5.1, which situation caused the beanbag to travel the furthest?
When we let it go while we were running with it.
300
A force that opposes motion, resulting from the contact of two surfaces is called _________.
Friction
300
A father is teaching his young daughter to ice skate by pulling her across the ice with a short rope. If the daughter (whose mass is 25 kg) starts to accelerate at 0.35 m/sec^2, with what force is the father pulling her?
8.8 Newtons
300
A rock has a mass of 523 grams. What is its weight in Newtons?
5.1 Newtons
300
Experiment 5.2 helped us to understand what concept?
Friction
400
Why will friction always be present when two surfaces touch each other?
Matter is composed of atoms, and the atoms of the one surface will attract the atoms of the other surface.
400
A 501-pound rock has fallen onto a frozen pond that you want to use as an ice-skating rink. If you push the rock with a force of 16 pounds, how fast will the rock accelerate?
1.0 ft/sec^2
400
A 745-kg box is sliding across a floor (us=0.45, uk=0.32). What is the frictional force between the box and floor?
2,300 Newtons
400
Which is the greater force: static friction or kinetic friction?
Static friction
500
True or false - Sir Isaac Newton rejected the divinity of Christ.
True.
500
If an astronaut weighs 296 Newtons on Mercury (where the acceleration due to gravity is 3.95 m/sec^2), how much does she weigh on earth?
730 Newtons
500
A construction worker is sliding a 74-kg box of bricks across a wooden board (us=0.26, uk=0.12). If the man pushes with a force of 92 Newtons, how fast will the box accelerate?
0.05 m/sec^2
500
From Experiment 5.2, we learned that the frictional force between two surfaces is strongly dependent on the ___________ which make up those surfaces.
Molecules.