Physics

Average speed is (Position2 - position1)/time.

Newtons first law of motion states that an object in motion will stay in motion and an object at rest will say at rest.

fluid friction.

One third its weight on earth's surface

32 km/h

the difference is 10

because 60

+ 70

130

- 120

10= friction

If your mass increases, your weight also increases.

The magnitude of the balls displacement is 9 meters.

2 m south

the seat

A projectile has an initial forward velocity.

Acceleration is "force divided by mass" or "change in velocity with respect to change in time".

An unbalanced force can completely destroy the object (depending upon its mass and power of force) or can gradually move it or it can also have no effect on the object.

An object falling at terminal velocity is moving at constant speed (that's what terminal velocity means) and we will assume it is not changing direction (i.e. it is falling straight down; in reality it is more likely to be bobbing and weaving on the wind.) Constant speed and direction is another way of saying constant velocity. when an object is acted upon by a net force, it's velocity changes. So, since we know that the velocity is not changing, there is no force.

velocity.

its size.

the sky overhead

a ball that moves when kicked

It has variable acceleration

It accelerates at a speed of 5m/s

Isaac Newton defines force as mass times acceleration.

the earth and moon have different values for the acceleration due to gravity.

You need to apply Newton's Second Law, which in this case simply means, divide the force by the mass. The answer will be in meters per second squared.

The ground