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Grade 11 Challenge: Physics in the Real World Worksheet with Answers

Grade 11 (US) · Year 12 (UK) · Class 11 (India) · Science

Unit 6: Going FurtherReal-World ChallengesChallenge

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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Challenge: Physics in the Real World

Grade 11 · Science

Score___ / 12

Name

Class

Date

Learning goal: Real-World Challenges

Directions: Read each question carefully and write your answer on the line.

Example

Mars is 288 million km from Earth today. Radio signals travel at 300 000 km/s. How many minutes does a message take to reach a rover there? Give your answer to 1 decimal place.

Answer: 16.0

  1. 1

    A 63 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)

  2. 2

    A 55 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)

  3. 3

    A 87 kg hiker climbs 500 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)

  4. 4

    Mars is 301 million km from Earth today. Radio signals travel at 300 000 km/s. How many minutes does a message take to reach a rover there? Give your answer to 1 decimal place.

  5. 5

    A car travelling at 50 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?

  6. 6

    A phone slips from a height of 45 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?

  7. 7

    A 84 kg person stands on bathroom scales in a lift that is speeding up going down at 1 m/s². What force do the scales read, in newtons? (g = 9.8 m/s², nearest whole number)

  8. 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. 9

    A 65 kg hiker climbs 500 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. 10

    Mars is 362 million km from Earth today. Radio signals travel at 300 000 km/s. How many minutes does a message take to reach a rover there? Give your answer to 1 decimal place.

  11. 11

    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?

  12. 12

    A 86 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)

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Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/11/challenge_physics_world

Answer key (click to show)
  1. 1.806
  2. 2.412
  3. 3.408
  4. 4.16.7
  5. 5.14
  6. 6.29.7
  7. 7.739
  8. 8.9.9
  9. 9.304
  10. 10.20.1
  11. 11.12.9
  12. 12.645

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