1 .How do we often perceive an object to be in motion?
Q 2. What
is essential to describe the position of an object?
Q 3. Give the technical term used for the rate of motion of a body. Give its SI unit.
Q 4. A truck is moving on a straight road with uniform acceleration. The following table gives the speed of the truck at various instants of time :
Speed
(m/s) 5 10 15 20 25 30
Time (s) 0 10 20 30 40 50
i.Draw a speed – time graph by choosing a convenient scale . Determine from it :
The acceleration of truck.
ii.The distance travelled by the truck in 50 seconds.
Q 5. An object travels a distance of 16 m in 4s and then another 16m in 2 s. What is the average speed of the object?
Q 6. Name the physical quantities denoted by :
i. The slope of the distance – time graph ii. The area under velocity – time graph.
Q 7. In which direction do the following forces act when object is in motion : i. Frictional force. ii. Gravitational force. iii. Centripetal force.
Q 8. Define average speed and average velocity.
Q 9. A train travels at a speed of 60 km/hr for 0.52 hr, at 30 km/hr for the next 0.24 hr and then, at 70 km/hr for the next 0.71 hr. What is the average speed of the train?
Q 10. Define the following terms:
i. Acceleration
ii. Uniform Motion iii. Uniform accelerated motion
Q 11. What do the following instrument measures?
i. Odometer ii. Speedometer
Q 12. Plot velocity-time graph of a body whose initial velocity is 5 m/s and is moving with retardation of 1m/s2.Also calculate the distance covered by it.
Q 13. Study the velocity-time graph of a car given below and answer the following questions:
i. What type of motion is represented by OA? ii. Find the acceleration from B to C. iii. Calculate the distance covered by the body from A to B.
Q 14. Write three advantages of velocity-time graph.
Q 15. Study the velocity-time graph of a body given below and answer the following questions:
i. State the type of motion represented by part BC.
ii. Identify the part of graph which has zero acceleration. Give reason for your answer.
Q 16. State with reasons, if it is possible or impossible for an object to have acceleration opposite to the direction of motion.
Q 17. A bus accelerates from rest at the rate of 0.2 m/s2. What will be the velocity attained by it in 1 minute?
Q 18. A Policeman ‘P’ is chasing a thief ‘T’. The distance-time graph of their motion is given below.
i. How much is T ahead of P when the
motion starts?
ii. When and where will P catch T?
Q 19. Define Uniform Circular Motion.
Q 20. What does the area under velocity – time graph represent?
Q 21. Differentiate between:
Uniform motion in a straight line and Uniform circular motion
Q 22. Using the graph given below, derive II equation of motion for position-time relation.
Q 23. What is negative acceleration? Give one example of it.
Q 24. A ball is thrown vertically upward with a velocity of 5 m/s. It uniformly accelerates at the rate of -10m/s2, stops after reaching a certain height and begins to fall back downwards. Calculate the height attained by the ball before it falls back.
Q 25. Study the graph given below and answer the questions based on it:
i. State the type of motion represented by the part AB.
ii. Calculate the distance travelled by the object in the first five hours.
Q 26. A car covered 85 km in the first two hours and 150 km in the next three hours.
Calculate the average speed of the car.
Q 27. A mechanic strikes a nail with hammer moving with a velocity of 20 m/s. The hammer comes to rest in 0.02 s after striking the nail. Calculate the acceleration of the nail.
Q 28. The driver of a train which is moving with a velocity of 108 km/h applies brakes. The train retards uniformly at the rate of -1 m/s2 and stops after covering certain distance.
Find the distance covered by the train during retardation.
do we often perceive an object to be in motion?
Q 2. What is essential to describe the position of an object?
Q 3. Give the technical term used for the rate of motion of a body. Give its SI unit.
Q 4. A truck is moving on a straight road with uniform acceleration. The following table gives the speed of the truck at various instants of time :
Speed
(m/s) 5 10 15 20 25 30
Time (s) 0 10 20 30 40 50
i. Draw a speed – time graph by choosing a convenient scale . Determine from it :
The acceleration of truck.
ii. The distance travelled by the truck in 50 seconds.
Q 5. An object travels a distance of 16 m in 4s and then another 16m in 2 s. What is the average speed of the object?
Q 6. Name the physical quantities denoted by :
i. The slope of the distance – time graph ii. The area under velocity – time graph.
Q 7. In which direction do the following forces act when object is in motion : i. Frictional force. ii. Gravitational force. iii. Centripetal force.
Q 8. Define average speed and average velocity.
Q 9. A train travels at a speed of 60 km/hr for 0.52 hr, at 30 km/hr for the next 0.24 hr and then, at 70 km/hr for the next 0.71 hr. What is the average speed of the train?
Q 10. Define the following terms:
i. Acceleration
ii. Uniform Motion iii. Uniform accelerated motion
Q 11. What do the following instrument measures?
i. Odometer ii. Speedometer
Q 12. Plot velocity-time graph of a body whose initial velocity is 5 m/s and is moving with retardation of 1m/s2.Also calculate the distance covered by it.
Q 13. Study the velocity-time graph of a car given below and answer the following questions:
i. What type of motion is represented by OA? ii. Find the acceleration from B to C. iii. Calculate the distance covered by the body from A to B.
Q 14. Write three advantages of velocity-time graph.
Q 15. Study the velocity-time graph of a body given below and answer the following questions:
i. State the type of motion represented by part BC.
ii. Identify the part of graph which has zero acceleration. Give reason for your answer.
Q 16. State with reasons, if it is possible or impossible for an object to have acceleration opposite to the direction of motion.
Q 17. A bus accelerates from rest at the rate of 0.2 m/s2. What will be the velocity attained by it in 1 minute?
Q 18. A Policeman ‘P’ is chasing a thief ‘T’. The distance-time graph of their motion is given below.
i. How much is T ahead of P when the
motion starts?
ii. When and where will P catch T?
Q 19. Define Uniform Circular Motion.
Q 20. What does the area under velocity – time graph represent?
Q 21. Differentiate between:
Uniform motion in a straight line and Uniform circular motion
Q 22. Using the graph given below, derive II equation of motion for position-time relation.
Q 23. What is negative acceleration? Give one example of it.
Q 24. A ball is thrown vertically upward with a velocity of 5 m/s. It uniformly accelerates at the rate of -10m/s2, stops after reaching a certain height and begins to fall back downwards. Calculate the height attained by the ball before it falls back.
Q 25. Study the graph given below and answer the questions based on it:
i. State the type of motion represented by the part AB.
ii. Calculate the distance travelled by the object in the first five hours.
Q 26. A car covered 85 km in the first two hours and 150 km in the next three hours.
Calculate the average speed of the car.
Q 27. A mechanic strikes a nail with hammer moving with a velocity of 20 m/s. The hammer comes to rest in 0.02 s after striking the nail. Calculate the acceleration of the nail.
Q 28. The driver of a train which is moving with a velocity of 108 km/h applies brakes. The train retards uniformly at the rate of -1 m/s2 and stops after covering certain distance.
Find the distance covered by the train during retardation.
0 Comments