Impulse and Force Calculations

The video tutorial explains the concept of impulse in physics, starting with a constant force example and moving to variable forces. It demonstrates how to calculate impulse using both direct calculations and graphical methods, emphasizing the area under the force-time graph. The tutorial also covers complex examples involving multiple shapes and discusses the concept of negative impulse when the force is below the x-axis.

What is the impulse exerted on a 10 kg block when a constant force of 80 N is applied for 5 seconds?

• 400 N·s

• 800 N·s

• 160 N·s

• 80 N·s

How do you calculate impulse when the force increases from 0 to 80 N at a constant rate?

• Use the initial force

• Use the final force

• Use the average force

• Use the maximum force

What is the impulse when a force increases from 0 to 80 N over 5 seconds at a constant rate?

• 80 N·s

• 100 N·s

• 200 N·s

• 400 N·s

When calculating impulse for a force changing from 100 to 300 N over 10 seconds, what is the average force used?

• 100 N

• 200 N

• 300 N

• 400 N

What is the impulse exerted when a force changes from 100 to 300 N over 10 seconds?

• 2500 N·s

• 1000 N·s

• 1500 N·s

• 2000 N·s

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

• Displacement

• Impulse

• Acceleration

• Velocity

How do you calculate the impulse from a force-time graph with varying force?

• Find the maximum force

• Find the average force

• Find the slope of the graph

• Find the area under the curve

What is the impulse exerted by a force that varies between 0 to 300 N and back to 100 N over a given time?

• 8000 N·s

• 7000 N·s

• 6000 N·s

• 9000 N·s

What happens to the impulse if the area under the force-time graph is below the x-axis?

• Impulse is doubled

• Impulse is negative

• Impulse is zero

• Impulse is positive

If a force-time graph shows a positive and a negative force, what is the net impulse?

• Average of positive and negative impulses

• Product of positive and negative impulses

• Difference between positive and negative impulses

• Sum of positive and negative impulses