Newton’s second law

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.