Newton's 1st Law
Inertia
Who Came up with the laws of motion?
Issac Newton
Newton's third law states that any action will have a(n) _______ and ______ reaction
Equal and Opposite
According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
remain in motion.
A skier needs to apply a force of 132 N to accelerate at a rate of 2 m/s2. What is the mass of the skier?
66 kg
Motions need an unbalanced net force to maintain. True or False
False
Which is easier? pushing an empty shopping cart or a full shopping cart? why?
The empty one because it has less mass
You hit a wall with a stick. The equal but opposite reaction is _____
the wall pushes against the stick
An object at rest will _______ if no outside forces are applied.
Stay at rest
A 50 kg skater pushed by a friend accelerates 5 m/s2. How much force did the friend apply?
250 N
Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron?
They're the same
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object is what?
Newton's 2nd Law
A bus hits a bug and the bug splatters on the windshield, which force is greater?
They're the same
The SI units for force are ____
Newtons
The mass of a car is 1000 kg. How much force would be required to accelerate the car at a rate of 3 m/s2?
3000 N
An object following a straight-line path at a constant speed has ____
zero acceleration
What's the formula for Newton's second law of motion (Force)?
F= M x A
When a heavy football player and a light one run into each other, who exerts more force?
They are equal
If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the ground first?
The balls land at the same time.
What is the acceleration of a 50 kg object pushed with a force of 500 newtons?
10 m/s2
friction is a force that acts
opposite to the direction of the motion
If you use the same force to push a truck and push a car which one will have more acceleration and why?
The car because it has less mass
Suppose two carts, one twice as massive as the other, fly apart when the compressed spring that joins them is released. How fast does the heavier cart roll compared with the lighter cart?
half as fast
A crumpled piece of paper hits the ground before a flat sheet of paper because
there is more air resistance against the flat paper.
A 5 kg block is pulled across a table by a net force of 32 N. Calculate the acceleration of the object.
6.4 m/s2