## Can an object move?

Force can make things move, change shape or change their speed. Some forces are direct and happen when two things touch (like a foot kicking a ball) or over a distance (such as a magnet or gravity). Friction is the force between two objects in contact with each other that will resist an attempt to move them.

## Will the ball move by itself answer?

Answer: No! Explanation: Because In the first law of motion , an object will not change its motion unless a force acts on it.

## What can cause an object to start moving?

Force and Motion Forces cause all motions. Everytime the motion of an object changes, it’s because a force has been applied to it. Force can cause a stationary object to start moving or a moving object to change its speed or direction or both. A change in the speed or direction of an object is called acceleration.

## What 3 things can a force change about an object?

A force can do one of four things to an object:

• Make it speed up – accelerate.
• Make it slow down – decelerate.
• Change its direction.
• Change its shape.

## How can we change the shape of an object give example?

Change of shape

1. Bend an object’s ends past each other, eg when an Olympic diver stands on the end of a diving board.
2. Pull an object’s ends apart, eg when a rubber band is stretched.
3. Push an object’s ends together, eg when an empty drinks can is squashed.

## Why does the weight of an object decrease in water?

A: When objects are placed in water, their mass does not change. Archemedes’s principle states that the force pushing on an object under water, is equal to the mass of the water it has pushed out of the way. So things apear lighter because the water is actually helping to push it up.

## Which force causes boats to float?

This force is called buoyant force. The buoyant force pushes upwards against the object. Gravity exerts a downward force on the object (its weight), which is determined by the object’s mass. So if the force exerted downward on the object by gravity is less than the buoyant force, the object will float.

## Why does a pencil float?

Objects with tightly packed molecules are more dense than those where the molecules are spread out. Density plays a part in why some things float and some sink. Objects that are more dense than water sink and those less dense float. Hollow things often float too as air is less dense than water.