Sec 3 Express Kinematics

What is the average speed of an MRT train if it takes 25 min to travel 15 km from Jurong East Station to Orchard Station?

• 48 km/h

• 0.8 km/h

• 120 km/h

• 36 km/h

Choose the graph that best represents the deceleration and then the acceleration of an object.

• A

• B

• C

• D

The diagram shows a velocity-time graph of a car. At which point is the car decelerating most quickly?

• A

• B

• C

• D

A mass of 2.5 kg falls from rest. It would be correct to say that _______________.

• it falls with a constant acceleration of 25 m/s²

• it falls with a constant acceleration of 10 m/s²

• it falls with a constant acceleration of 4 m/s²

• it falls with a constant velocity of 10 m/s²

Tags

NGSS.HS-PS2-1

A motorcycle starts from rest on a straight road and reaches a speed of 25 m/s after 5 s. What is its average acceleration in that time?

• 25 m/s²

• 125 m/s²

• 250 m/s²

• 5 m/s²

A car travels distance, s with time, t, from a fixed point. The car gradually slows down and finally stops. Which of the following graphs best represents the whole journey?

• A

• B

• C

• D

A car travels at constant speed for a period of time and then accelerates at a constant rate. Which one of the graphs best shows the relationship between the car's speed, v and time, t?

• A

• B

• C

• D

Which one of the following graphs shows the acceleration of a moving body decreasing with time?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

A car starts from rest and is uniformly accelerated to a speed of 30 m/s in 6 s. What distance is travelled by the car?

• 2.5 m

• 5 m

• 30 m

• 90 m

The graph shows the speed of a car over the first ten seconds of a journey. Which portion of the graph shows motion with a constant deceleration?

• A

• B

• C

• D