Which object has the greatest inertia? tennis ball, volleyball, beach ball, bowling ball
Bowling ball
100
When objects are moved further apart from each other, the force of gravity between them
Decreases
100
Which object does NOT have momentum? a fish swimming in a pond, a feather falling to the ground, a rock by the side of the road, a boulder rolling down a hill
a rock by the side of the road
100
ONe newton is the force that can give a mass of 1 kg an acceleration of
1 m/s/s
100
When the velocity of an object changes, it is acted upon by a
Force
200
What force causes a skater sliding on the ice to gradually slow down?
friction
200
Orbital motion is a combination of_________and______.
Forward Motion and free fall
200
When a moving bowling ball hits a pin, some of the ball's momentum is _____________.
is transferred to the pin.
200
A 0.25kg of steel ball experences a net force of 1.15 N as it rolls down a ramp. What is the acceleration?
4.6 m/s/s
200
Action and reaction forces always occur at________time.
the same
300
An object changes motion only if a force acts on it to change its speed or direction. This is a statement of Newton's ________.
First Law
300
The gravitational force on an object_________as the object's mass increases.
Increases
300
If you divide momentum by velocity, the result is the value of the object's
Mass
300
Calculate the velocity of a 90.5 kg man running south witha momentum of 389 kg *m/s
4.30 m/s south
300
The force exerted on the racket by a hit tennis ball is the _______.
reaction force
400
A seat belt helps you when your car stops suddenly by providing an
an unbalanced rearward force.
400
The free fall acceleration of an object under Earth's gravity is directed __________.
toward the center of the Earth.
400
How does the total momentum of two objects before a collision compare witht he total momentum after the collision?
It is the same.
400
What is the momentum of 255 gram apple falling at 16.0m/s
4.08 kg*m/s downward
400
Two identical cars are traveling with equal speeds. One is going north and the other south. They collide head-on and stick together. How will the cars react after the collision?
Both cars will stop
500
If an equal fouce is applied to two cars of equal mass, Car A and Car B, Car A will have _________ acceleration as Car B.
the same
500
When an object is in free fall, the only foce acting on it is__________.
gravity
500
What would have a momentum of zero?
anything not moving
500
A foce of 6.2X10^5N is needed to blast off a 5.0X10^3 kg rocket from rest. What is the rocket's average acceleration?
1.2 X 10^2 m/s/s
500
What are newtons 3 laws?
1. an object at rest remains at rest and an object in motion maintains its velocity unless it experiences an unbalanced force. 2. the unbalanced force acting on an object equals the object's mass times its acceleration. 3. For every action force, there is an equal and opposite reaction force.