What is a PUSH or PULL on an object?
Force
Using force to move an object a distance
Work
a force between surfaces that causes them to resist
Friction
A golf ball rolls down a hill on the golf course. Which statement best describes how friction affects the motion of the golf ball?
A. Friction causes the golf ball to roll forwards and backwards.
B. Friction decreases how far the ball rolls.
C. Friction increases how fast the ball rolls.
D. Friction causes the ball to bounce.
B. Friction decreases how far the ball rolls.
What do we call the force that pulls objects towards Earth's center?
gravity
If these boys are each pulling with the force of 10 newtons. What will happen?
The boy in blue will win.
They will not move at all.
The boy in red will win.
They will not move at all. Balanced force is being applied.
What is the equation to calculate speed?
speed = distance / time
What is a change in the speed of an object considered?
ACCELERATION
The length between 2 points or objects
Distance
Using Newton's 2nd Law, what is the acceleration of an object with a mass of 10kg, and a force of 100 N?
F= m*a
10 m/s2
Which of the following statements is true?
Balanced forces cause a change in position.
Unbalanced forces cause a change in position.
Forces do not affect position.
Unbalanced forces cause a change in position.
a force that opposes or slows down another force
Resistance
The measure of the amount of matter in a body.
Mass
The speed of something in a given direction
Velocity
For an object to change direction ---------- must be applied.
force
What is Newton's 2nd Law?
"Law of Acceleration" The greater the force the greater the acceleration.
the quantity of motion of a moving object, "Mass in Motion"
Momentum
An objects resistance to a change in motion
Inertia
What is constant speed?
1.When the speed of an object stays the same.
2.When the speed of an object increases.
3.When the speed of an object decreases.
1.When the speed of an object stays the same
The gravitational pull on an object is its-------.
weight
What does Newton's first law state?
An object at rest (in motion) will stay at rest (in motion) unless acted on by another force.
Stored energy in an object when it is not moving
Potential energy
What is the formula for velocity?
V=distance/time
I have a change in speed, but NOT direction, is this acceleration? Yes or no?
Yes
What is the speed of a train that covers 200 km in 2 hours?
200 / 2 = 100 km/hr
An object that is moving fast has more----------than an object that is moving slow.
kinetic energy
IF 5 students push a block to the East with a force of 12 newtons and were joined by 3 more students who contributed 8 more newtons but were opposed by 7 students pushing the block westward with a force of 18 newtons, which direction would the block move?
The block would move to the east.
What is the basic understanding of Newton's 3rd law of motion?
For every action there is an equal and opposite reaction.
Which car have a greater change in motion in a collision (crash)?
1. a car with low mass
2. a car with high mass
3. a car with medium mass
1. a car with low mass
What is the average speed of a train that covers 80km in 1 hr, then 200 km in 2 hrs, and then 240 km in 2 hrs?
80/1 = 80
200/2 = 100
240/2 = 120
80+100+120 = 300
300/3 = 100km/hr