Vocab
Push or pull measured in Newtons
What is force?
How much force is needed to accelerate a 66 kg skier at 2 m/sec2?
An object that is in free fall seems to be A) not moving, B) slowed by air resistance, C) speeded up by air resistance or D) Weightless
What is not moving?
When 1 force is stronger than the other
What is an unbalanced force
When you have speed in a given direction. (the last chapter)
What is velocity?
Measures magnitude and direction
What is a vector?
A force of 20 N acts upon a 5 kg block. Find the acceleration of the object.
What is 4 m/s2
How do you find Newtons?
What is KG times m/s
When both forces are the same
What is balanced force?
A change in speed, direction, or both
What is acceleration?
a force that opposes motion of 2 objects that are touching
What is friction?
Louisa rolls a ball with 31N of force. She observes that it has a constant linear acceleration of 2.1ms2. What is the mass of the ball?
What is 14.76kg
If gravity did not affect the path of a horizontally thrown ball the ball would?
What is force measured in?
What is Newtons?
When an object changes position over time in relation to a reference point.
What is motion
The "getting started" friction. Also known as stationary friction
What is static friction?
Michael pushes a 2kg box with 30N of force to the left. Annie pushes the same box with 40N of force to the right. What is the net force on the box?
What is 10N
3 m/s north is an example of a?
Is determined by combining forces
What is the net force?
this is a measure of inertia.
What is mass?
the moving type of friction
What is kinetic friction?
How much force is required to accelerate a 3kg crate at 1.1ms2?
What is 3.3 N
The upward force of an object falling through the air is?
What is Air Resistance?
When all forces acting on an object are equal the object must be?
What is at rest?
The acceleration of an object depends on its mass and on the force exerted on it
What is Newton's second law?