Understanding Newton's 1st Law

When all the forces on an object are equal and opposite, & the net force is zero, that's...

• balanced forces

• unbalanced forces

• terminal velocity

• reaction forces

Which of the following best describes a balanced force?

• Forces that cause an object to start moving

• Forces that are equal in size and opposite in direction

• Forces that cause an object to change direction

• Forces that cause an object to accelerate

What happens to an object at rest when balanced forces are applied to it?

• It starts moving

• It remains at rest

• It accelerates

• It changes direction

Which of the following is an example of Newton's 1st law?

• A car accelerating on a motorway

• A book lying on a table

• A ball rolling down a hill

• A rocket launching into space

How does Newton's 1st law apply to a passenger in a car that suddenly stops?

• The passenger will move forward due to inertia

• The passenger will remain in place

• The passenger will move backward

• The passenger will float upwards

Which of the following is true about mass and weight?

• Mass is the force of gravity on an object

• Weight is the amount of matter in an object

• Mass is measured in kilograms, while weight is measured in newtons

• Mass changes with location, while weight remains constant

If a 10 kg object is on Earth, what is its approximate weight in newtons?

• 10 N

• 98 N

• 100 N

• 9.8 N

Which of the following scenarios demonstrates unbalanced forces?

• A book resting on a table

• A car moving at a constant speed

• A person pushing a stationary car

• A hanging picture frame

In which situation would Newton's 1st law be most applicable?

• A cyclist pedalling uphill

• A ball thrown in space

• A car accelerating from a stop

• A swimmer diving into a pool

What is the primary reason a moving object eventually comes to a stop on Earth?

• Balanced forces

• Unbalanced forces

• Friction

• Gravity