Constant Acceleration

Of the following situations, which one is impossible?

• A body having velocity east and acceleration east

• A body having velocity east and acceleration west

• A body having zero velocity and non-zero acceleration

• A body having constant acceleration and a changing velocity

• A body having constant velocity and changing acceleration.

A car, initially at rest, travels 20m in 4s along a straight line with constant acceleration. The acceleration of the car is:

• 0.4 m/s2

  
  1.3 m/s2

• 2.5 m/s2

• 4.9 m/s2

• 9.8 m/s2

A racing car traveling with constant acceleration increases its speed from 10 m/s to 50 m/s over a distance of 60m. How long does this take? (Find acceleration first)

• 2.0s

• 4.0s

• 5.0s

• 8.0s

• 10.0s

A car starts from rest and goes down a slope with a constant acceleration of 5.0 m/s2. After 5s the car reaches the bottom of the hill, its speed is:

• 1 m/s

• 12.5 m/s

• 25 m/s

• 50 m/s

• 160 m/s

A car movinng with an initial velocity of 25 m/s east has a constant acceleration of 3 m/s2 west. After 6 seconds, its velocity will be:

• 7 m/s east

• 7 m/s west

• 43 m/s east

• 20 m/s east

• 20 m/s west

The diagram shows a velocity-time graph for a car moving in a straight line. At point Q, the car must be: (choose two options)

• moving with a zero acceleration

• traveling downhill

• traveling below ground level

• reducing speed

• traveling in the reverse direction to that at point P

The diagram shows a velocity-time graph for a car moving in a straight line. At point P the car must be: (choose two options)

• moving with zero acceleration

• climbing a hill

• accelerating

• stationary

• traveling backwards

A car accelerates toward the origin as indicated on the diagram. What would the position-time and velocity-time graphs look like?

• A

• B

• C

• D

A cart slows down while moving away from the origin. What do the velocity and acceleration graphs look like?

• A

• B

• C

• D

Which velocity-time graph goes with this acceleration graph?

• A

• B

• C

• D

• E