Speed and Velocity
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Calculations
100

If an object takes 10s to travel 100m, calculate its speed.

10m/s

100

State Newton's 1st law of motion.

An object will remain in constant motion until acted apon by an external, unbalanced force.

100

Newton's second law of motion can be expressed as an equation. What is it?

F = ma or F = mg

100

State Newton's third law of motion.

For every action, there is an equal and opposite reaction.

100

Calculate the force applied on a 500g tennis ball to accelerate it to 4 m/s2.

2N

200

If an object travels around a 400m track, calculate its displacement.

0m

200

Define the term 'inertia'.

A tendancy for an object to do nothing or remain unchanged.

200
Which of the following requires more force to accelerate? A bowling ball with a mass of 500g or a tennis ball with a mass of 150g?

Bowling ball

200

If a tennis ball is slammed into the ground with a force of 32N, calculate the reaction force.

32N

200

If an object has an initial velocity of 0m/s and accelerates to 20m/s in 10 seconds, calculate its total acceleration.

2 m/s2

300

If an object has a velocity of 5 m/s2 for 32 seconds, calculate its displacement.

160m

300

If an object has a small mass, what could be said about its inertia?

The smaller the mass of an object, the less inertia it would have.

300

A man with a mass of 70kg travels to Mars, where the gravitational force acting on his body is 3.2 m/s2. Calculate his weight force.

224N

300

A car is travelling at a constant velocity and has a total thrust force of 2000N. Calculate the drag force.

2000N - car is travelling at a constant velocity.

300

Calculate the mass of a person if the gravitational force is 9.8 m/s2 and the weight force is 980N.

100 kg

400

If a boat is travelling at 13 m/s, what does this equate to in km/h?

46.8 km/h

400

As a car is accelerating in a given direction, what is the opposing force that is acting on the object that would inevitably slow it down?

Friction or drag force.
400

Why are crumple zones important in cars?

Crumple zones increase the amount of time a car decelerates. The greater the amount of time, the less force acting on the body.

400

Calculate the net force of an object that has a force of 320N to the right and 180N to the left.

140N

400
An object is decelerating from 39m/s to a velocity of 10m/s. Calculate its total deceleration if it takes 4 seconds to do so.

7.25 m/s2 or -7.25 m/s2

500

If a student walked 150m west, then 200m north to school, what is his total displacement?

250m NW

500

True or false: An object's inertia is dependent on its mass, not the force acting on it.

False - it is dependent on both force and mass.

500
Calculate the acceleration of a soccer ball with a mass of 323g, kicked with a force of 1292N.

4 m/s2

500

True or false: As an object accelerates, the braking force is greater than the thrust force.

False
500

What was the margin from the Collingwood vs Adelaide game last night?

24 points

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