Calculations
If an object has a mass of 10kg and is accelerating at 2m/s^2, what is the force acting on it?
20N
What is the equation to calculate force?
F=m*a
State Newton's First Law of Motion.
An object at rest will stay at rest unless acted on by an outside force. Or an object in motion will stay in motion unless acted on by an outside force.
What are simple machines?
any tool that makes work easier and changes a force
Provide an example of action and reaction forces.
answers will vary
If a car travels 100m in 2 seconds, what is its speed?
50 m/s
How would you rearrange F=m*a to solve for mass?
m=F/a
State Newton's Third Law of Motion.
For every action there is an equal and opposite reaction
Name the six types of simple machines.
pulley, screw, lever, inclined plane, wheel & axel, wedge
How do rockets utilize Newton's Third Law?
They push the fuel downward which makes the rocket lift off the ground.
If a force of 20N is applied to an object with a mass of 4kg, what is the acceleration?
5 m/s^2
What is the equation to calculate speed?
S=d/t
State Newton's Second Law of Motion.
The greater the mass the more force required to move that mass. More mass= less acceleration, less force = less acceleration, F=m*a
Describe how a pulley works and give an example of its use.
the pulley changes the force of an object from a downward force to an upward force helping you lift the object.
How does increasing mass affect acceleration when the force is constant?
More mass is going to slow down the acceleration if the force stays constant
If a cyclist travels at a speed of 15m/s for 30seconds, how far does she travel?
450 m
How does force affect the acceleration of an object?
The greater the force the greater the acceleration.
What is the unit of force in the International System (SI)?
Newtons (N)
How does an inclined plane reduce the amount of force needed to lift an object?
it increases the distance over which a force is used
What is inertia?
An object being at rest or in motion and wanting to stay that way
DAILY DOUBLE
A train covers 300m in 3s. Calculate its speed.
100 m/s
List all of the equations to calculate speed, distance, time, force, mass and acceleration
s=d/t
d=t*s
t=d/s
F=m*a
m=F/a
a=F/m
DAILY DOUBLE
Provide a detailed real world example of each of Newton's Laws
Answers may vary
Label and draw all 6 simple machines
check work
Why is it harder to start moving a heavy object than a light object?
The heavier object takes more force and has more mass so it wants to stay at rest. The lighter object takes less force and has less mass to accomplish the same task.