Understanding Impulse and Force-Time Graphs

What is the unit of impulse?

• Kilograms

• Meters per second

• Newton seconds

• Joules

How does the direction of motion affect the sign of impulse?

• Impulse sign depends on the chosen positive direction

• Impulse is always negative

• Impulse sign is independent of direction

• Impulse is always positive

Which equation represents impulse?

• Impulse = force / time

• Impulse = mass × velocity

• Impulse = force × time

• Impulse = velocity / time

If a force of -5 Newtons is applied for 2 seconds, what is the impulse?

• -10 Newton seconds

• 10 Newton seconds

• -5 Newton seconds

• 5 Newton seconds

How did Newton originally express his second law of motion?

• Force = change in momentum over time

• Force = mass × acceleration

• Force = mass / time

• Force = velocity × time

What is the final velocity of a 1000 kg car if a 5000 N force is applied for 3 seconds, starting at 30 m/s?

• 25 m/s

• 35 m/s

• 40 m/s

• 30 m/s

What does the area under a force-time graph represent?

• Velocity

• Impulse

• Acceleration

• Force

How do you calculate the area under a force-time graph for a constant force?

• Force × Time

• Base × Height

• 1/2 × Base × Height

• Height × Width

In a force-time graph, what does a negative area under the curve indicate?

• Constant force

• Zero impulse

• Negative impulse

• Positive impulse

If a car's force increases uniformly from 0 to 2000 N over 8 seconds, what is the impulse?

• 16000 Newton seconds

• 8000 Newton seconds

• 4000 Newton seconds

• 2000 Newton seconds