# Physics question - Constant acceleration and distance travelled

physics question -- Constant acceleration and distance travelled

an object is moving with a constant acceleration, if it travels a distance d during the first 2 seconds and an additional D in the next 2 seconds the ratio of D/d is?

a) 1
b) 2
c) 3
d) 4

i don't understand exactly what the question is asking me to do?

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berkeman
Mentor

an object is moving with a constant acceleration, if it travels a distance d during the first 2 seconds and an additional D in the next 2 seconds the ratio of D/d is?

a) 1
b) 2
c) 3
d) 4

i don't understand exactly what the question is asking me to do?
Welcome to the PF.

What is the equation that relates the distance travelled to the velocity and acceleration of an object? It is one of the basic kinematic equations for problems involving constant acceleration.

Write out that equation, and the answer should be pretty straightforward...

vf^2-Vi^2=2adeltax is the equation you're talking about? i tried rearranging that for x and have no clue where to go from there

Welcome to the PF.

What is the equation that relates the distance travelled to the velocity and acceleration of an object? It is one of the basic kinematic equations for problems involving constant acceleration.

Write out that equation, and the answer should be pretty straightforward...
vf^2-Vi^2=2adeltax is the equation you're talking about? i tried rearranging that for x and have no clue where to go from there

berkeman
Mentor

vf^2-Vi^2=2adeltax is the equation you're talking about? i tried rearranging that for x and have no clue where to go from there
No, I'm referring to the equation for x(t) in terms of initial position, initial velocity, acceleration, and time...

Use area of a triangles and square in a velocity-time diagram.
You can find v1, 2 and acceleration from this constant acceleration diagram.
Since it is a ratio you can start for v0=0.