Physics Worksheet

💥 Impulse

Chapter: Mechanics · Level ★★☆ · Time: 30 min

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NameClassDate

After this worksheet you can

Understand: Impulse DefinitionUnderstand: Impulse-Momentum TheoremUnderstand: Units of ImpulseUnderstand: Extending Collision Time to Reduce Force

🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4

1A 8 N force acts for 5s. Find impulse.

2A 3 kg object's velocity changes from 4 to 10 m/s in 2s. Find the average force.

3A baseball (0.15 kg) changes velocity from -20 m/s to 20 m/s (a full reversal) during a 0.01s bat contact. Find the average force.

4Why does catching a fast ball with a 'soft hands' technique (pulling your hands back) hurt less?

🧮 Section B · Problem Solving ● INTERMEDIATE 4 × 3 = 12

5What does the area under a force-time graph represent?

6A 500 kg car changes velocity by 10 m/s during a collision lasting 0.2s. Find the average force.

7If the same momentum change happens over a much shorter time, how does the average force change?

8A 2 kg object experiences an impulse of 16 N*s. If its initial velocity was 0, find its final velocity.

🚀 Section C · Challenge ● CHALLENGE 2 × 2 = 4

9Why are padded gloves used in boxing and other combat sports?

10A 0.5 kg object's momentum changes by 4 kg*m/s over 0.5s. Find the average force applied.

💭 Reflection — the most useful thing I learned:

A ___/4 B ___/12 C ___/4 Total ___/20 Teacher's Signature Parent's Signature

✂ answer key — fold or cut before handing out

1 = 40 N*s 2 = F*2=3*6=18, F=9N 3 = F*0.01=0.15*40=6, F=600N 4 = It extends the time of the catch, reducing the average force for the same change in the ball's momentum | 5 = The total impulse delivered 6 = F*0.2=500*10=5000, F=25000N 7 = It increases significantly, since force and time are inversely related for a fixed impulse 8 = 16=2*v, v=8 m/s | 9 = They extend the time of impact, reducing the peak force experienced for a given momentum change 10 = F=4/0.5=8N