A train starting from a railway station and moving with uniform acceleration attains a speed of 40 km h^-1 in 10 minutes. Find its acceleration.

Given figures represent the motion of two objects P and Q. Which of the objects has positive acceleration and which one has negative acceleration?

Fill in the blanks.

(i) ………..is the term used for negative acceleration.

(ii) A bus starting from rest attains a velocity of 54 km/h in 60 s, its acceleration is …………….. .

When you apply brakes to a car, in which direction is its acceleration?

You are sitting in a stationary car. There is a helium balloon tied to its floor. You accelerate and obviously feel like you are being pushed backwards (against the direction of your accelerations). The balloon.

Give an example of negative acceleration from daily life situation.

What does the slope of a velocity – time graph represent?

Give Reasons for the Following:

In a long distance race, the athletes were expected to take four rounds of the track such that the line of finish was same as the line of start. The motion of the athlete is non-uniform. Why?

A car is moving on a straight road with a uniform acceleration. The following table gives the speed of the car at various instants of time.

(i) Draw the shape of speed-time graph representing the above sets of observations.

(ii)Find the acceleration of the car.

Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give example of a body in uniform acceleration.