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

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

Unit 5: 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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Challenge: Physics in the Real World

Grade 11 · Physics

Score___ / 12

Name

Class

Date

Learning goal: Real-World Challenge

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

Example

A car travelling at 130 km/h brakes hard on an icy road (coefficient of friction 0.1, g = 9.8 m/s²). What is its braking distance, to the nearest metre?

Answer: 665

  1. 1

    Escape velocity from Earth is 11.2 km/s, and v = √(2GM/R). A planet has 0.1 times Earth's mass and 0.5 times its radius. What is its escape velocity, in km/s to 1 decimal place?

  2. 2

    A satellite orbits 420 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. 3

    Escape velocity from Earth is 11.2 km/s, and v = √(2GM/R). A planet has 0.5 times Earth's mass and 0.5 times its radius. What is its escape velocity, in km/s to 1 decimal place?

  4. 4

    A 82 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)

  5. 5

    A 67 kg person stands on bathroom scales in a lift that is speeding up going up at 2 m/s². What force do the scales read, in newtons? (g = 9.8 m/s², nearest whole number)

  6. 6

    Mars is 114 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.

  7. 7

    A phone slips from a height of 20 m. Ignoring air resistance (g = 9.8 m/s²), how long does it take to hit the ground, in seconds to 2 decimal places?

  8. 8

    Mars is 190 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.

  9. 9

    A 72 kg person stands on bathroom scales in a lift that is speeding up going down at 2 m/s². What force do the scales read, in newtons? (g = 9.8 m/s², nearest whole number)

  10. 10

    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?

  11. 11

    Mars is 355 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.

  12. 12

    Escape velocity from Earth is 11.2 km/s, and v = √(2GM/R). A planet has 9 times Earth's mass and 3 times its radius. What is its escape velocity, in km/s to 1 decimal place?

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Teacher's comments

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

Answer key (click to show)
  1. 1.5.0
  2. 2.93
  3. 3.11.2
  4. 4.384
  5. 5.791
  6. 6.6.3
  7. 7.2.02
  8. 8.10.6
  9. 9.562
  10. 10.166
  11. 11.19.7
  12. 12.19.4

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