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Lizzie is pushing Alex on the scooter. Lizzie is pushing with 75 n of force to the left and Alex is helping with 20 n to the left. What is the net force on the scooter?
95n to the left
In order to determine an object location, you need a
Reference point
Motion can be described through a change in
Position
A train travel, 250 km from a starting point in five hours if the train continues at the same average speed for another four hours, how far will I have traveled from the starting point?
450 km
This term refers to how fast an object is moving
Speed
What does a speedometer in a car measure
instantaneous speed
Vectors quantities include
Amount and direction
In physics, a push or a pull is known as
A force
According to Newton, second law, how will a larger force affect the motion of an object?
More acceleration
What is a net force?
0 n
True or false Forces that are equal in size with opposite and direction are called unbalanced forces
False
True or false if a net force acts on an object, the object may change speed direction or to neither
False
True or false balance versus acting on an object cause the object to accelerate
False
True or false friction always acts in the same direction as motion
False
True or false change in direction with no change in speed is one type of acceleration
True
What is Kathy’s average speed?
150 miles
How long after Kathy started jogging did Rachel begin jogging
After two minutes
Describe Rachael’s motion at nine minutes
Stopped
You’re riding in a car traveling at 80 km a fly trapped in the car on your shoulder describe the speed of the fly using two different reference points
The car is going 80 km/h the fly on your shoulder is not moving at all because your shoulder is also not
Explain how to find the average speed of a car that travels 300 km in six hours then find the average speed
Divide. 50 km.