Forces
If two people are playing tug-o-war, and the person on the left is pulling with more force, which direction will the rope pull?
Left
What is the formula for speed?
Distance divided by time
True or False. Gravity attracts and repels objects.
False
F=ma explains which Newton's Law?
What are the two types of collisions?
Elastic and Inelastic
The type of force applied to a moving object
Unbalanced Force
What is the difference between the units for speed and velocity?
Velocity has direction
What happens to gravity as distance increases?
It decreases
Which of Newton's Laws is also known as the law of inertia?
Newton's 1st Law
What are the 2 parts of the Universal Law of Gravitation?
Gravity increases as mass increases
Gravity decreases as distance increases
What is the equation for Force
F=ma
A car travels 70 miles in 5 minutes. What is the speed?
14 miles per minute
What is the mass of a 45 kg object on the moon if the moon's acceleration 1.62 m/s/s?
45 kg
Momentum applies best to which of Newton's Laws of Motion?
Newton's 1st Law
You hit a baseball with a bat. What is the action force and what is the reaction force?
Bat hitting ball= action
Ball hitting bat=reaction
A crane is lifting up with 640 Newtons of force, and the car is pulling down with 560 Newtons of force, what is the net force and direction of the car?
80 N up
A car goes from 0 m/s to 60 m/s in 5 seconds. What is its acceleration?
12 m/s/s
What two motions cause the orbiting of Earth?
Earth moving forward and gravity from the sun
What is Newton's 3rd Law?
For every action there is an equal and opposite reaction
What is the formula for momentum?
p=mv
If you divide the force being placed on object by its mass, what will you solve for?
Acceleration
A kg/m/s2 is also called a
Newton
What three factors affect air resistance?
Size, shape and speed
If the amount of force applied does not change, the more you decrease mass, what happens to the acceleration?
It increases
An object with a mass of 10 kg is traveling right at 5 m/s2. An object with a mass of 5 kg is traveling left at 4 m/s2. What is the net force and direction of the object?
30 N right