Maths/Physics

posted by .

Which of these statements are true...

I think (1)and (5) are correct

1)A reversing vehicle must have negative velocity

2) A stationary object must have zero position

3)Two vehicles trvelling at the same speed at the same instant of time on the same road must have the same velocity.

4) If a vehicle has zero acceleration it must be stationary

5) Velocity is the rate of change of position

6)An object slowing down must have negative velocity

7)The graph of position against time for a vehicle with constant velocity is a straight line

I appreciate your help :- Thanks

  • Maths/Physics -

    Well, seven is certainly true. Five is true. But 1) does not make sense. If it reverses, the final velocity is in the opposite direction as the initial velocity. So on the term "negative velocity", you can decide what it means. The initial velocity can be a postive or negative quantity, and the final velocity will be opposite to the intial. The wording is silly on that choice.

  • Maths/Physics -

    Bob
    thanks..

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. maths

    Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not …
  2. math

    Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not …
  3. math

    Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not …
  4. Velocity

    Which of these statements are true... I think (1)and (5) are correct 1)A reversing vehicle must have negative velocity 2) A stationary object must have zero position 3)Two vehicles trvelling at the same speed at the same instant of …
  5. math

    choose 2 correct option about motion in a straight line. 1. if a vechile has a zero velocity it must be stationary 2.the graph of position against time has to be a st.line 3.acceleration is the rate of change of speed 4.velocity is …
  6. math

    What is true for motion in a straight line. A. if a vechile has zero velocity , it must be stationary. B.the graph of position against time has to be a straight line. C.acceleration is the rate of change of speed. D.velocity is the …
  7. PHYSICS

    An object has an acceleration of 0 m/s squared. Does this mean that the object must be stationary. Explain. Stationary means that the object does not move. I don't think that the object must be stationary in this case because the scalar …
  8. College Physics

    Which of the following statements is false?
  9. Physics

    In projectile motion the acceleration at the highest point of curved motion is___. a. 0 b. g c. undefined d. –g Which is true about an object was dropped from a 5 storey building?
  10. Physics

    1. Which statement below is true? a. If a car is traveling eastward, its acceleration is eastward. b. If a car's speed is decreasing, its acceleration must be negative. c. If a particle is moving, it must have a non-zero acceleration.

More Similar Questions