newtons Second Law
Force
problems
Newtons laws
Vocabulary
100
What are newtons
the International unit of measure of force
100
What is Force
A push or pull on a object
100
A train takes 5 seconds to travel 15 meters. What is the train's speed?
What is 3 m/s
100
This states that an object’s motion will not change unless an unbalanced force acts on the object.
What is Newton's First Law?
100
What is a vector
a quanity that has both magnitude and direction
200
What is acceleration?
A change in velocity
200
What are two types of force ?
contact force and non contact force
200
A 500 kg race car is accelerating at 20 m/s^2. What net force acts on the car?
What is 1000 m/s^2
200
This law states F=ma.
What is Newton's 2nd law?
200
what is a contact force
a push or pull on a object by another object touching it.
300
What is Mass
The total amount of matter or stuff in an object
300
What are two states that force can be in
Balanced forces and unbalanced forces
300
A 100 N force pushes an object with a mass of 20 kg. What is the object's acceleration?
what is 5 m/s ^2
300
What is the formula for Force
F=MXA
300
give example of a non contact force and explain why it is a non contact force
gravity is a non contact force as it acts on a object without touching it.
400
What is net force?
the sum of all forces acting on a object.
400
Objects with more mass need a greater ________ to accelerate
What is force?
400
a car travels 120 km north in 2 hours then it turns around and travels 60 km south in 1 hour what is the average velocity of the car?
take 120 -60
equals
60 = displacement
total time of travel = 3 hours
velocity = 60/3
20 km/h north
400
This is the formula for speed.
What is distance divided by time? (v=d/t)
400
give an example of a contact force
a person kicking a ball
500
What is newtons second law of motion?
The acceleration of an object equals the net force on the object divided by the objects mass.
500
make a free body diagram showing an unbalanced rightward force.
500
John starts at his house and walks 3 km east to the grocery store. Then, he walks 2 km west to the post office what is Johns displacement from his starting point?
what is 1 km east
take 3k east -2 km east
equals 1 km for displacement.
500
This is the unit of acceleration.
What is m/s2
500
What is newtons 1st law
An object at rest tends to stay at rest unless acted upon by an outside force