Show:
Newton's Laws
Gravity
Forces
Physics
Science + Math =
100
The statement “to every action there is an equal and opposite reaction” is which law?
Newton's Third Law
100
The upward force exerted on an object falling through air is __________.
air resistance
100
Forces always occur... a. By themselves b. In pairs c. As single quantities d. In triplets
b. In pairs
100
_____ prevents surfaces in contact from sliding past each other. (be specific)
Static friction
100
A 4.3 kg box is pushed with a force of 40N. What is the box's acceleration?
4.3 m/s^2
200
When two objects collide, their momentum after the collision is explained by what law?
The Law of Conservation of Momentum.
200
Define terminal velocity
Forces on an object are balanced and the object falls with constant speed.
200
Two people hit on opposite sides of a box, each with 30 N. What is the net force on the box?
0 N
200
The _____ of an object is different on other planets in the solar system.
weight
200
If a couch has a mass of 250 kg, what is its weight?
2450 N
300
What equation represents Newton’s second law?
F=ma
300
The amount of gravitational force between objects depends on what two things?
Mass and distance
300
When a force is exerted on an object, an equal and opposite force is exerted by the object. These forces are referred to as __________.
Action-Reaction forces
300
The attractive force between two objects that depends on their masses and the distance between them is _____.
gravity
300
What’s the mass of an object if it’s weight is 175 N?
17.86 kg
400
List the three types of friction in order of strongest to weakest
Static, Sliding, Rolling
400
The force of gravity acting on an object is called… a. Inertia b. Mass c. Weight d. None of the above
c. Weight
400
In a collision… a. Two objects experience the same force b. The smaller object pushes harder on the larger object c. The larger object pushes harder on the smaller object d. It depends on the situation
a. Two objects experience the same force
400
The way in which objects exert forces on each other is described by _____. (which law?)
Newton's 3rd Law.
400
If a box is being pulled with an upward force of 3 N and pulled to the right with a force of 4 N. What is the net force acting on the box?
5 N up and to the right
500
A real car moving at 10 km/h has more momentum than a toy car moving at the same rate because:
The real car has a greater mass.
500
How do the forces of gravity and air resistance compare for an object at terminal velocity? a. Gravity is stronger b. They are equal c. Air resistance is stronger d. Depends on the object
b. They are equal
500
An archer shoots an arrow. Consider the action force to be the bow string pushing against the arrow. The reaction force to this is the... a. Weight of the arrow b. Grip of the archer’s hand on the bow c. Air resistance against the bow d. Arrow pushing against the bowstring e. Arrow pushing against the air as it flies
d. Arrow pushing against the bowstring
500
_____ relates the net force exerted on an object to its mass and acceleration. (which law?)
Newton's 2nd law.
500
What is the acceleration of the box for the 400 point problem if its mass is 15 kg?
0.33 m/s^2