Newton's 1st law
What is the Newton's first law
states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction, unless acted upon by an unbalanced external force.
What is Newton's 2nd law?
An object accelerates when a net force acts on it.
What is Newton's 3rd law
For every action, there is an equal and opposite reaction.
Is a car accelerating if the net force is zero and why?
No, there is no unbalance forces acting on it
What is inertia?
The property of an object to resist changes in its state of motion
What is the equation for newton’s 2nd law?
F=ma
True on false: When a ball hits the ground, it exerts force back which allows it to bounce back up.
True
If someone pulls the cloth from underneath plates and cups will the plates and cups stay on the table or fall off?
The plates will stay on the table because of their inertia they want to stay at rest
What is Newton's first law also called
The law of inertia.
What is the net force of a bike with the acceleration of 5 m/s^2 and the mass of 36kg?
F= 180 N
What does “equal and opposite” mean?
Forces come in pairs, equal in strength but opposite in direction.
Give an example of Newton’s 3 law
example: if you push up a on a dumbbell the dumbbell pushes back on you
Does the law of inertia apply to objects at rest and moving objects, or just one?
It applies to both.
What's the net force to stop a 2.5 kg basketball in 2s if it’s initially move at speed of 14 m/s
F=-17.5
When a swimmer pushes the water backward, where does the water pushes the swimmer
Forward
If you push a shopping cart
a. Who has more acceleration?
b. Who experiences the bigger force?
a. The shopping cart
b. Both experiences the same amount of force
If you are a passenger in a car that makes a sharp turn, what happens to you and why?
You slide towards the outside of the turn because your body's inertia causes it to continue moving in a straight line, while the car is turning.
What is the net force to stop a 65.52 kg shopping cart in 5.84 s if it’s initially traveling at 4.93 m/s
F= -55.29 N
Why does hitting a wall hurt your hand according to Newton’s 3rd Law?
Since you are applying force to the wall, the wall is applying force back to your hand.
In the terms of Newton's why the Earth doesn't appear to move if everyone in class jumps at the same time?
The Earth has a much bigger mass so it has much smaller acceleration compared to us