Motion in one dimension - Assam Valley School

Work Sheet - 4Name of the Student:-_____________________9 – PHYSICS Class :- 9- Sec _____ Academic Year:-Motion in one dimension1. Define acceleration. Write its mathematical expression and S.I unit. State whether it is a scalar or vectorquantity.2. Explain the following terms - uniform acceleration, non-uniform acceleration and acceleration due to gravity.3. Distinguish between speed and velocity. Write four points of difference.

Work Sheet - 5Name of the Student:-_____________________9 – PHYSICS Class :- 9- Sec _____ Academic Year:-Motion in one dimension [Numericals]1. Express 36km/h in m/s.2. Express 15m/s in km/h.3. A train takes 3h to travel from Balipara to Guwahati with a uniform speed of 70km/h. Find the distancebetween the two cities.4. A car moving due east covers 1km in 100sec. Find its speed and velocity.

Work Sheet - 6Name of the Student:-_____________________9 – PHYSICS Class :- 9- Sec _____ Academic Year:-Motion in one dimension [Numericals]1. The velocity of a moving body changes at a constant rate from 50m/s to 20m/s in 3sec. Find acceleration.2. A body takes 2h to move from point A to point B and 3h to come back. The distance between A & B is200km. Find the average speed and average velocity.3. A body moving with 10m/s comes to rest in 2sec. Find retardation.

Work Sheet - 7Name of the Student:-_____________________9 – PHYSICS Class :- 9- Sec _____ Academic Year:-Motion in one dimensionDraw the following graphs –i) displacement – time graph for a stationary objectii) displacement – time graph for uniform velocityiii) displacement – time graph for variable velocityiv) velocity – time graph for uniform velocityv) velocity – time graph for uniform retardationvi) velocity – time graph when the body is initially not at restvii) acceleration – time graph for motion with uniform velocityviii) acceleration – time graph for uniform accelerationix) acceleration – time graph for uniform retardation.x) acceleration – time graph for a freely falling bodyxi) velocity – time graph for a freely falling body

Work Sheet - 8Name of the Student:-_____________________9 – PHYSICS Class :- 9- Sec _____ Academic Year:-Motion in one dimension1. Derive the following equations -i) v = u + atii) S = ut + ½ at 2iii) v 2 = u 2 + 2as2. Write the equations of motion for the following special cases –i) when the body starts from restii) when the body is retardingiii) when a body initially at rest falls freely under gravityiv) when a body initially not at rest and falls freely under gravityv) when a body is thrown vertically upwards.

Work Sheet - 9Name of the Student:-_____________________9 – PHYSICS Class :- 9- Sec _____ Academic Year:-Motion in one dimension [Numericals]1. A bullet moving with 20m/s strikes a target and comes to rest after penetrating 10cm. Calculate theretardation.2. A car moving with 20m/s is brought to rest by applying brakes in 5sec. Calculate retardation.3. a body travels with 60km/h from point A to point B and returns with 80km/h. Find average speed and averagevelocity.4. A body moves from rest with uniform acceleration and travels 270m in 3sec. Find the velocity of the body at10sec from the start.5. A body dropped from the top of a tower acquires a velocity of 20m/s on reaching the ground. Calculate theheight of the tower.