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Grade 12 Challenge: Physics in the Real World Worksheet with Answers
Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Physics
Unit 6: Going FurtherReal-World ChallengeChallenge
Real physics with real numbers: dropped phones, the ISS's orbit, escape velocity, braking on ice and messages to Mars. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comChallenge: Physics in the Real World
Grade 12 · Physics
Name
Class
Date
Learning goal: Real-World Challenge
Directions: Read each question carefully and write your answer on the line.
A car travelling at 70 km/h brakes hard on a wet road (coefficient of friction 0.4, g = 9.8 m/s²). What is its braking distance, to the nearest metre?
Answer: 48
- 1
A 78 kg person stands on bathroom scales in a lift that is speeding up going down at 3 m/s². What force do the scales read, in newtons? (g = 9.8 m/s², nearest whole number)
- 2
A satellite orbits 400 km above Earth's surface. Earth's radius is 6371 km and GM = 3.986 × 10^14 m³/s². What is its orbital period, to the nearest minute?
- 3
A car travelling at 130 km/h brakes hard on a wet road (coefficient of friction 0.4, g = 9.8 m/s²). What is its braking distance, to the nearest metre?
- 4
A 89 kg hiker climbs 800 m up a mountain. Muscles are about 25% efficient and 1 kcal = 4184 J. How many kcal of food energy does the climb use, to the nearest whole number? (g = 9.8 m/s²)
- 5
A phone slips from a height of 1.5 m. Ignoring air resistance (g = 9.8 m/s²), how long does it take to hit the ground, in seconds to 2 decimal places?
- 6
Escape velocity from Earth is 11.2 km/s, and v = √(2GM/R). A planet has 2 times Earth's mass and 1.5 times its radius. What is its escape velocity, in km/s to 1 decimal place?
- 7
A 68 kg person stands on bathroom scales in a lift that is speeding up going up at 3 m/s². What force do the scales read, in newtons? (g = 9.8 m/s², nearest whole number)
- 8
A phone slips from a height of 5 m. Ignoring air resistance (g = 9.8 m/s²), how fast is it moving when it hits the ground, in m/s to 1 decimal place?
- 9
A 72 kg hiker climbs 1000 m up a mountain. Muscles are about 25% efficient and 1 kcal = 4184 J. How many kcal of food energy does the climb use, to the nearest whole number? (g = 9.8 m/s²)
- 10
A satellite orbits 800 km above Earth's surface. Earth's radius is 6371 km and GM = 3.986 × 10^14 m³/s². What is its orbital period, to the nearest minute?
- 11
A 50 kg person stands on bathroom scales in a lift that is speeding up going up at 1 m/s². What force do the scales read, in newtons? (g = 9.8 m/s², nearest whole number)
- 12
A car travelling at 70 km/h brakes hard on a dry road (coefficient of friction 0.7, g = 9.8 m/s²). What is its braking distance, to the nearest metre?
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Free printable worksheets with answer keys · aethelsystems.com/worksheets/physics/12/challenge_physics_world
Answer key — Challenge: Physics in the Real World (Grade 12)
- 1.530
- 2.92
- 3.166
- 4.667
- 5.0.55
- 6.12.9
- 7.870
- 8.9.9
- 9.675
- 10.101
- 11.540
- 12.28
Answer key (click to show)
- 1.530
- 2.92
- 3.166
- 4.667
- 5.0.55
- 6.12.9
- 7.870
- 8.9.9
- 9.675
- 10.101
- 11.540
- 12.28
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