Numerical Problems | Chapter 2 Kinematics | Physics 9th | Balochistan Board Queta | Urdu/Hindi скачать в хорошем качестве

Numerical Problems | Chapter 2 Kinematics | Physics 9th | Balochistan Board Queta | Urdu/Hindi

1. A car travels 100 meters in 5 seconds what is its average speed? 2. A car accelerates from 5ms^(-1) to 25ms^(-1) in 10 seconds. What is its acceleration? 3. A car starts from rest. If acceleration of car is 5ms^(-2) then what will be its velocity after 8s? Express this velocity in kmh^(-1). 4. A car is moving with 180kmh^(-1). A negative acceleration of 10〖ms〗^(-2) is produced after applying brakes. What will be the distance covered by car before coming to rest? 5. A ball thrown up vertically with a speed of 〖50ms〗^(-1). (a) How long does it take to reach its highest point? (b) How does high the ball rise? 6. A driver brings a car travelling at 22〖ms〗^(-1) to stop it in 2 seconds. (a) What is the car’s acceleration? (b) How far does it travels before stopping? 7. A car moving with velocity of 72kmh^(-1) is brought to rest in 10s. Calculate the retardation. 8. A body start up from rest and acquires a velocity of 8〖ms〗^(-1) in 5s. Calculate (a) The acceleration (b) The distance covered in 5s (c) The distance covered in 5th s 9. An airplane must reach at 71〖ms〗^(-1) from takeoff. If the runway is 1km long. What must the acceleration be? 10. The figure shows a speed-Time graph for a motor cycle. Find (a) What is the maximum speed of the motorcycle? (b) For how many second does the motorcycle stay at its maximum speed? (c) For how many seconds is the motorcycle actually moving? (d) How much speed does the motorcycle gain in first 20s? How much speed does it gain every second? What is its acceleration? (e) What is the retardation of the motorcycle during last 10 seconds. 11. Velocity of a motorcycle becomes 20〖ms〗^(-1) in 4 seconds with an acceleration of 2〖ms〗^(-2). Find its initial velocity. 12. A stone is dropped from height of 80m. Find its velocity just before hitting the ground. If it reaches the ground in 4 seconds. v_f=40〖ms〗^(-1)