Posted by **leo** on Sunday, March 23, 2008 at 12:02pm.

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 -
**bobpursley**, Sunday, March 23, 2008 at 12:07pm
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 -
**leo**, Sunday, March 23, 2008 at 12:11pm
Bob

thanks..

## Answer This Question

## Related Questions

- Velocity - Which of these statements are true... I think (1)and (5) are correct ...
- math - choose 2 correct option about motion in a straight line. 1. if a vechile ...
- math - What is true for motion in a straight line. A. if a vechile has zero ...
- maths - Which three options are true about motion in a straight line. A. A ...
- math - Which three options are true about motion in a straight line. A. A ...
- math - Which three options are true about motion in a straight line. A. A ...
- PHYSICS - An object has an acceleration of 0 m/s squared. Does this mean that ...
- College Physics - Which of the following statements is false? 1)The velocity of ...
- physics - Which of the following statements about work is or are true? (More ...
- Physics - Write True or False. If False, Explain why! 1. In a position vs. Time...

More Related Questions