Inertia
This law is about inertia
Newton's 1st Law of Motion
Objects with a greater mass will have inertia.
More/greater
This means an object is at rest on a distance-time graph.
A straight horizontal line
This is how we calculate distance travelled.
Speed x time
Calculate the average speed for a trip that took 5 hours to go 400 km.
80 km/h
This is the scientist who described the effect of inertia.
Sir Isaac Newton
More of this is needed to change the motion of objects with more mass.
Force
This means an object is moving at a constant speed on a speed-time graph.
A straight horizontal line
This is how we calculate time of travel.
Distance divided by speed
Calculate the distance travelled if you drive an average of 50 km/h for 7 hours.
350 km
This type of force will change the motion of an object.
An unbalance force
A body not wearing a seatbelt in a car crash will continue at what speed until it is stopped by something, such as the windshield?
The same speed the car was travelling
This means that an object is moving at a constant speed moving back towards some reference point on a displacement-time graph.
A straight line with a negative slope
How do you calculate the displacement of an object that did not move in a straight line.
Calculate the length of the hypotenuse OR measure the straight line distance between starting and ending points.
Calculate the time it would take to walk 2 km moving at a rate of 5 km/h.
What is 0.4 hours or 24 minutes?
This type of force will not change the motion of an object.
A balanced force
Objects will keep moving this way unless acted upon by unbalanced forces.
The same speed and direction
On a distance-time graph, this means the object is accelerating.
A curved line with a positive slope
How do you calculate velocity?
Displacement divided by time
A car drives 5km east and 12km north. What is the total displacement of the car?
13km
According to the law of inertia, objects resist this.
Any change in their motion
An object at rest will stay at rest because of this.
Inertia
This means an object is accelerating on a speed-time graph.
A straight line with a positive slope (not horizontal)
How do you calculate displacement?
Velocity x time
Calculate the time it would take to reach a velocity of 30 m/s if you jump out of an airplane. (Acceleration of gravity on earth is approximately 10 m/s).
3 seconds