Question

question 10
select the best definition of an unbalanced force.
a force that is equal in size and opposite in direction to another force
a force that has no effect on an objects motion
a force without an equal and opposite force acting on the same object
im not sure
question 11
determine which of the following objects have unbalanced forces acting on them.
a car that is speeding up
a laptop resting on a desk
a rolling ball that is slowing down
an aeroplane travelling at a constant speed
im not sure

Explanation:

Question 10

An unbalanced force is one that doesn't have an equal and opposite force acting on the same object. The first option describes a balanced force. The second option is incorrect as unbalanced forces do affect motion.

• A car speeding up has unbalanced forces (net force causing acceleration).
• A laptop resting on a desk has balanced forces (gravity and normal force).
• A rolling ball slowing down has unbalanced forces (friction as net force).
• An aeroplane at constant speed has balanced forces (thrust and drag, lift and weight).

Answer:

A force without an equal and opposite force acting on the same object

Question 11