Push or Pull
What is a force?
Which force acts between two surfaces rubbing together?
Friction
What is the net force when forces are balanced?
0N
A force of 10 N → acts to the right and 6 N ← acts to the left. What is the net force?
4 N to the right.
What do the arrows on a force diagram represent?
Forces acting on an object.
What unit is measured in force?
Newtons (N)
Which force slows down a skydiver?
Air resistance
What happens to an object at rest when the forces acting on it are balanced?
It stays at rest.
A force of 15 N ← acts to the left and 5 N → acts to the right. What is the net force?
10 N to the left.
What does a longer arrow represent on a force diagram?
A larger (stronger) force.
Which force pulls objects toward Earth?
Gravity
Name two non-contact forces.
What happens to an object that is already moving if the forces acting on it are balanced?
It continues moving at the same speed and in the same direction.
Two forces of 20 N act in opposite directions. What is the net force?
0 N
If all the force arrows are equal in size and opposite in direction, are the forces balanced or unbalanced?
Balanced.
Name 2 things a force can do to an object
A tow truck pulls a car using a cable. What force acts through the cable?
Tension
What can unbalanced forces cause an object to do?
Speed up, slow down, or change direction.
A force of 18 N → acts to the right and 8 N ← acts to the left. What is the net force?
10 N to the right.
A toy car has a larger forward force than backward force. What will happen?
It will accelerate (speed up) forward.
A person pushes a shopping trolley. What type of force is being used?
Applied Force
A boat floats on water. Which two forces are balanced when the boat is floating?
Gravity (weight) pulling down and buoyancy (upthrust) pushing up.
Two students push a box with 25 N each from opposite sides. What is the net force?
A force of 30 N → acts to the right while 15 N ← and 5 N ← act to the left. What is the net force?
10 N to the right.
A boat has an engine force of 40 N → and water resistance of 25 N ←. What is the net force, and what will happen?
The net force is 15 N to the right, so the boat will accelerate forward.