Vocabulary
A push or a pull.
Force
Newton's 1st Law is often called the Law of _______.
Inertia
How much force is required to accelerate a 12 kg mass at 5m/s^2?
60 N
What is the speed of an object at rest?
0 mph
The unit force is measured in.
Newtons
The force that exists between any 2 objects that have mass.
Gravity
How do we calculate force?
Force = mass x acceleration
How much force is required to accelerate a 5 kg mass at 20 m/s^2?
100 N
What is the speed of an object that has traveled 200 miles in 5 hours?
40 mph
If the forces are balanced, what is the net force?
0N
The combination of all forces acting on an object.
Net force
A force is exerted on a box and an equal and opposite force is exerted by the box. Which law explains this?
Newton's 3rd Law
Given a force of 10 N and an acceleration of 5 m/s^2, what is the mass?
2 kg
A car traveling down the road drives 100 meters in 50 seconds. What is its speed?
2 m/s
Which substance is added to an engine to reduce friction?
a. gas b. inertia c. oil d. brakes
c. oil
What is a resistance to a change in motion?
Inertia
What is Newton's 1st Law of Motion?
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.
What is the acceleration of a 24 kg mass pushed by a 6 N force?
.25 m/s^2
If an ant crawls 1 meter in 25 seconds, what is the ant's speed?
0.04 m/s
A student pushes against a tree with a force of 20 N. The tree does not move. What is the amount of force exerted by the tree?
20 N
What is a change in velocity (speed) over time?
Acceleration
What is Newton's 2nd Law of Motion?
Acceleration depends directly in force and inversely on mass.
How much force is required to accelerate a 150 g object, 10 m/s^2?
1.5 N
What is the average speed of a bird that flies 1 km in 30 minutes? Express your answer in km/hr
2 km/hr
Name three different kinds of friction.
Rolling, static, sliding, fluid, air resistance