Class 9 practice questions-1 based on chapter 2 (motion in one dimension)

 Q1. Shyam throws a body downwards from the top of a tower.draw a distance- time graph of its free fall under gravity during the first four seconds. So you table to values starting from t =0s with an interval of 1 second. Take g=10m/s²

Q2. Ashok is cycling at uniform rate of 8 m/s for 8 seconds. He then stops padelling and cycle comes to rest in in next 10 seconds. Draw velocity-time graph. Find the average velocity of the cyclist.

Q3. Spacecraft flying in a straight course at 75 km/s fires its rocket motors for 6.0 seconds. At the end of this time, speed of spacecraft is 120 km/s in the same direction. Draw velocity-time graph and hence find following:

A) average acceleration of spacecraft while the motors were firing.

B)distance travelled by the spacecraft in the first 10 seconds after the rocket motors were started, the motors have been in action for only 6 seconds.

Q4. Rithvik throws a ball vertically upwards with initial velocity of 49 m/s. Draw velocity time graph and find following:

A) the maximum height reached

B) total distance travelled by the ball before it comes to rest on the ground again.

Q5. Ashok Kumar drives car with average speed of X metre/s during first of its journey and with Y m/s during the remaining half. Find the average speed with which Ashok drives his car for entire journey?