Posted by **jojo** on Monday, April 30, 2007 at 9:21am.

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 change.

C. A particle which has zero acceleration moves with constant velocity or is stationary.

D. A particle with negative position must have had a negative acceleration in the past.

E. The acceleration of any subject is 9.8m s^-2

F. A particle which moves with a constant acceleration also has a constant velocity.

G. An object which is dropped and falls only under gravity accelerates downwards at approximately 9.8m s^-2

H. Velocity is the magnitude of the speed.

I think A, B and G. Can anyone help?

## Answer this Question

## Related Questions

- 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 ...
- physics - A body starts with an initial velocity of 10m/s and moves along a ...
- Chels - What can you say about the motion of a body if its veloctiy-time graph ...
- math - What is true for motion in a straight line. A. if a vechile has zero ...
- Physics true false - true false The speed of a particle is always positive. True...
- Physics - Pease evaluate the statements by choosing from these three statements ...
- math(mechanics) - the acceleration of a particle as it moves along a straight ...
- physics - a particle with velocity of 2m/s at t= 0 moves along a straight line ...
- physics - A common graphical representation of motion along a straight line is ...