Forces & Vocabulary
This is a push or pull on an object.
What is force?
If net force equals zero, forces are ______.
What are balanced forces?
Which law explains inertia?
What is Newton's 1st law
If mass = 10 kg and acceleration = 2 m/s², what is force?
What is 20 N?
Momentum equals mass times what?
What is velocity?
On the Moon, mass changes or weight changes?
What is weight changes?
Friction in air is called what?
What is fluid friction?
30 N right and 20 N left equals?
What is 10 N right?
Inertia depends on what property?
What is mass?
A 10 kg object accelerates at 3 m/s². Find force.
What is 30 N?
A force that acts without touching an object.
What is a noncontact force?
An object with balanced forces will change / not change motion?
What is not change motion?
Passengers move forward when a car stops because of this law.
What is Newton’s First Law?
If force = 40 N and mass = 8 kg, what is acceleration?
What is 5 m/s²?
If mass = 5 kg and velocity = 4 m/s, what is momentum?
What is 20 kg·m/s?
Weight is a measure of what force?
What is gravity?
Friction when surfaces slide past each other?
What is sliding friction?
50 N up and 50 N down equals?
What is 0 N?
More mass means more or less inertia?
What is more?
A 15 kg object has 45 N net force. Acceleration?
What is 3 m/s²?
The combination of all forces acting on an object.
What is net force?
If 60 N right and 60 N left act on an object, the net force is:
What is 0 N?
F = ma belongs to which law?
What is Newton’s Second Law?
A 20 kg object has 100 N applied. What is acceleration?
What is 5 m/s²?
If velocity doubles, momentum does what?
What is it doubles?
Gravity depends on mass and what else?
What is distance?
Which friction is strongest at rest?
What is static friction?
100 N right, 40 N left equals?
What is 60 N right?
Why does a heavy truck take longer to stop?
What is greater inertia?
6 kg object moving at 5 m/s. Momentum?
What is 30 kg·m/s?
A force that prevents motion from starting.
What is static friction?
If 80 N right and 50 N left act, what is the net force and direction?
What is 30 N to the right?
Rockets move upward because of this law.
What is Newton’s Third Law?
A 12 kg object has 36 N net force. What is acceleration?
What is 3 m/s²?
An object has 200 kg·m/s momentum and velocity of 10 m/s. What is mass?
What is 20 kg?
If mass increases, gravitational force does what?
What is increases?
Why is it harder to start pushing than keep pushing?
What is static friction is greater than sliding friction?
Balanced vertically but 20 N more to the right. What happens?
What is accelerates right?
If force doubles and mass stays same, acceleration does what?
What is doubles?
80 N right and 30 N left act on 10 kg object. Acceleration?
What is 5 m/s² right?
A force that opposes motion between two surfaces in contact.
What is friction?
If vertical forces are balanced but horizontal forces are not, what happens?
What is the object accelerates horizontally?
If you push on a wall and the wall pushes back, what law explains this?
What is Newton’s Third Law?
Two objects experience the same force. One has half the mass. Which accelerates more?
What is the object with less mass?
Two objects have the same velocity, but one has more mass. Which has greater momentum?
What is the object with more mass?
If distance between two objects increases, gravitational force does what?
What is decreases?
Friction always acts in what direction compared to motion?
What is opposite?
If net force is 0 N, acceleration equals?
What is 0 m/s²?
If mass doubles and force doubles, acceleration does what?
What is stays the same?
A cart speeds from 2 m/s to 8 m/s in 3 seconds. Acceleration?
What is 2 m/s²?