Forces
The amount of matter in an object.
What is Mass?
A change in ________ will cause an object to accelerate.
What is speed?
(or what is velocity?)
Find the speed of an object.
d = 10 m
t = 2 s
What is 5 m/s?
"An object at rest will remain at rest, and an object in motion will remain in motion unless it is acted upon by an external force."
What is Newton's 1st Law of Motion?
(or What is the Law of Inertia?)
Find the force of the object.
m = 3,000 kg
a = 2 m/s2
What is 6,000 Newtons?
Formula for mass, force, and acceleration.
What is Force = Mass x Acceleration (F=ma)?
Describe the difference between speed and velocity.
What is velocity has a specific direction but speed does not?
A bus is traveling at a velocity of 25 m/s straight south. Describe the effect an acceleration of 4 m/s2 north will have on the bus.
What is a decrease in the velocity of the bus?
"The force acting on an object is equal to the mass of that object times its acceleration."
What is Newton's 2nd Law of Motion?
(or what is the Law of Acceleration)
Find the mass of the object.
F = 30 N
a = 3 m/s2
What is 10 kg?
What is the combination of all the forces acting on an object?
Definition of instantaneous acceleration.
What is acceleration at a specific moment in time?
Find the velocity of a car that traveled a total of 75 km north in 1.5 hr.
What is 50 km/hr?
"For every action, there is an equal and opposite reaction."
What is Newton's 3rd Law of Motion?
(or what is the Law of Action-Reaction?)
Find the acceleration of an object.
F = 14,000 N
m = 2,800 kg
What is 5 m/s2
What is Zero?
Straight line from an object's starting point to the object's ending point.
What is displacement?
Find the acceleration of an object.
Initial Velocity = 0 m/s
Final Velocity = 24 m/s
Time = 3 s
What is 8 m/s2
A man is driving in his car and runs into a log across the road. His car comes to a sudden stop. Use Newton's law of Inertia to describe what would happen.
What is the man would continue to move forward?
Find the acceleration of a diet coke can if it has a mass of 0.50 kg and hits the wall with a force of 25 Newtons.
What is 50 m/s2
Which of the following examples best demonstrates how unbalanced forces change the speed of an object's motion?
a. a child singing a song
b. a child sitting in a chair reading a book
c. a child on a bicycle braking at a stop sign
d. a child walking around the corner of a school hallway
What is the answer C?
The rate at which velocity changes over time.
What is acceleration?
A train is accelerating at a rate of 2.0 m/s2. Find its velocity after 30 seconds.
What is 60 m/s?
What is the box pushing against the boy?
Find the mass of a falling rock if it hits the ground with a force of 147 Newtons.
Hint: remember gravitational acceleration
What is 15 kg?