WORKSHEET 1: MOTION IN A STRAIGHT LINE [FM=10 | TIME: 20 MIN]
1. Can the average velocity of a body be zero even if the average speed of the same body is non-zero? Give a real-life
example to support your statement. [2]
2. A bus travels 36 kmph when the driver sees an obstacle 60 m ahead. The driver takes 2 seconds to react before
pressing the brake. Once the brakes are applied, the velocity of the bus reduces with a constant acceleration of 4 m/s2.
State whether the bus will be able to stop before reaching the obstacle. [3]
3. A stone is tied to a string of length 4m and swung in such a way that it travels in a circular path. Calculate the
displacement and average velocity of the stone if it covers 3/4 th of the path in 4 seconds. [3]
4. Derive analytically: i) v = u + at ii) S = ut + 1/2 at2. [2]
1. Can the average velocity of a body be zero even if the average speed of the same body is non-zero? Give a real-life
example to support your statement. [2]
2. A bus travels 36 kmph when the driver sees an obstacle 60 m ahead. The driver takes 2 seconds to react before
pressing the brake. Once the brakes are applied, the velocity of the bus reduces with a constant acceleration of 4 m/s2.
State whether the bus will be able to stop before reaching the obstacle. [3]
3. A stone is tied to a string of length 4m and swung in such a way that it travels in a circular path. Calculate the
displacement and average velocity of the stone if it covers 3/4 th of the path in 4 seconds. [3]
4. Derive analytically: i) v = u + at ii) S = ut + 1/2 at2. [2]
