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The Equations of Motion 1

The Equations of Motion 1. Q. 1. A car is moving at a velocity of 25 m s –1 . It accelerates at a rate of 6 m s –2 . Find its velocity after 3 seconds. Ans. 1. A car is moving at a velocity of 25 m s –1 . It accelerates at a rate of 6 m s –2 . Find its velocity after 3 seconds. ANSWER.

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The Equations of Motion 1

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  1. The Equations of Motion 1 The Professional Development Service for Teachers is funded by the Department of Education and Skills under the National Development Plan

  2. Q. 1 A car is moving at a velocity of 25 m s–1. It accelerates at a rate of 6 m s–2. Find its velocity after 3 seconds. PDST Resources for Leaving Certificate Physics2

  3. Ans. 1 A car is moving at a velocity of 25 m s–1. It accelerates at a rate of 6 m s–2. Find its velocity after 3 seconds.ANSWER Use the no s equation: PDST Resources for Leaving Certificate Physics3

  4. Q. 2 An object is dropped from rest. Calculate its velocity after 2.5 seconds if it is dropped:(a) on earth, where the acceleration due to gravity is 9.8 m s–2 (b) on mars, where the acceleration due to gravity is 3.8 m s–2? PDST Resources for Leaving Certificate Physics4

  5. Ans. 2 Note: when an object is dropped from rest, its initial velocity is 0. (a) (b) PDST Resources for Leaving Certificate Physics5

  6. Q. 3 A motorbike is travelling with a velocity of 3 m s–1. It accelerates at a rate of 9.3 m s–2 for 1.8 seconds. Calculate the distance it travels in this time. PDST Resources for Leaving Certificate Physics6

  7. Ans. 3 A motorbike is travelling with a velocity of 3 m s–1. It accelerates at a rate of 9.3 m s–2 for 1.8 seconds. Calculate the distance it travels in this time.ANSWER PDST Resources for Leaving Certificate Physics7

  8. Q. 4 A Tesla Roadster car accelerates from rest at a rate of 7.1 m s–2 for a time of 3.9 s. Calculate the distance it travels in this time. PDST Resources for Leaving Certificate Physics8

  9. Ans. 4 A Tesla Roadster car accelerates from rest at a rate of 7.1 m s–2 for a time of 3.9 s. Calculate the distance it travels in this time.ANSWER PDST Resources for Leaving Certificate Physics9

  10. Q. 5 A bullet accelerates at a rate of 90 000 m s–2from rest. Calculate its velocity if it travels a distance of 0.5 m while accelerating. PDST Resources for Leaving Certificate Physics10

  11. Ans. 5 A bullet accelerates at a rate of 90 000 m s–2 from rest. Calculate its velocity if it travels a distance of 0.5 m while accelerating.ANSWER PDST Resources for Leaving Certificate Physics11

  12. Q. 6 An aircraft is travelling along a runway at a velocity of 25 m s–1. It accelerates at a rate of 4 m s–2 for a distance of 750 m before taking off. Calculate its take-off speed. PDST Resources for Leaving Certificate Physics12

  13. Ans. 6 An aircraft is travelling along a runway at a velocity of 25 m s–1.It accelerates at a rate of 4 m s–2 for a distance of 750 m before taking off. Calculate its take-off speed.ANSWER PDST Resources for Leaving Certificate Physics13

  14. Q. 7 A car is travelling at a speed of 21 m s–1. It accelerates at an average rate of 3 m s–2 for a time of 4 seconds. Find the distance it travels during the 4 seconds. PDST Resources for Leaving Certificate Physics14

  15. Ans. 7 A car is travelling at a speed of 21 m s–1.It accelerates at an average rate of 3 m s–2 for a time of 4 seconds. Find the distance it travels during the 4 seconds.ANSWER PDST Resources for Leaving Certificate Physics15

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