Forces
A push or pull
What is Force
No change in motion
Uniform motion
A form of energy
two forces of equal strength that combine to act on the same object but in opposite directions
balanced force
Fill in the blank
A force has both strength and ________.
The two types of forces :
What is Contact force and Non Contact Force
The rate at which the speed or the direction of motion of an object changes over time
Acceleration
An area of partial darkness where light has been blocked by an object
the total of all forces acting on a body
net force
When forces on an object are balanced, the object will?
Answers vary.
- Stay still
- Not move
- Move at a steady pace
A force that acts at a distance
The tendency to resist any change in motion
Inertia
Fill in the blank :
The _________________ the light source is from the object, the ________________ the object's shadow is.
The farther the light source is from the object, the smaller the object's shadow is.
OR
The closer the light source is from the object, the bigger the object's shadow is.
two forces acting together in the same direction
combined force
In a tug-of-war, if one team pulls with a bigger strength than the other, the forces are:
UNBALANCED FORCES
A force that requires a touch
Contact Force
Air Resistance
the form in which light energy travels
waves
Fill in the blank:
When the forces acting on a body are balanced, the net force is ____________.
zero
A heavy dog sits on the floor. Gravity pulls it down, and the floor pushes up on the box. The forces are?
BALANCED FORCES
Attraction between any two objects
Gravity
True or False; An object that changes direction is still in uniform motion if it's moving at the same speed
Early in the morning or later in the day / when the sun is lower in the sky.
40 N!
If you push as toy car with 12N of force to the right, and your friend pushes with 3N of force to the left. What is the net force, and what happens?
the net force is : 15N
the object moves to the right.