# K R Prajwal

Good Essays
3297 Words
Grammar
Plagiarism
Writing
Score
K R Prajwal
Q.1 A particle is moving in a straight line with initial velocity u and retardation αv, where v is the velocity at any time t

[a] the particle will cover a total distance u/α

[b] the particle will come to rest after 1/α

[c] the particle will continue to move for a very long time

[d] the velocity of the particle will become u/2 after time 1/α

Q.2 A particle moves along the xaxis as x = u(t-1)2 + a(t-3)3

[a] initial velocity of the particle is u

[b] the acceleration of the particle is a

[c] the acceleration of the particle is 2a

[d] the particle is at the origin at time t=3 seconds

Q.3 A particle is projected vertically upwards

[a] the speed decreases uniformly with distance

[b] the speed decreases uniformly with time

[c] the KE decrease uniformly with time

[d] KE decreases uniformly with distance

Q.4 If an observer moves at constant speed along the line joining two stationary objects> he will the two objects

[a] have the same velocity

[b] have the same speed

[c] move in opposite directions

[d] move in the same direction.

Q.5 A particle is moving with uniform acceleration along a straight line AB. Its speed at A and B are 2m/s and 14m/s respectively. Then

[a] its speed at the midpoint is 10m/s

[b] its speed at point P such that AP:PB is 1:5 is 4m/s

[c] the time to go from A to mid point of AB is double to move from mid point to B

[d] none of the above.

Q.6 A body starting from rest is moving with uniform acceleration of 5m/s2 for time 10s, and after that with uniform acceleration of 10m/s2 for 15s, then

[a] average acceleration of the body is 7.5m/s2

[b] the average acceleration is 8m/s2

[c] total distance covered is 1875m

[d] total distance covered is 2125m

Q.7 A particle moves first 10m in 2s and 20m in the next 3s and 30m in next

## You May Also Find These Documents Helpful

• Satisfactory Essays

2. If an object is moving with a constant acceleration, what is the shape of its velocity vs time graph?…

• 519 Words
• 3 Pages
Satisfactory Essays
• Satisfactory Essays

A = 7.5(.5t) 5. Sketch the graphs of r(t) and A(t) on the same axes. Indicate which is which.…

• 434 Words
• 2 Pages
Satisfactory Essays
• Good Essays

(a) 25 m (b) 2.6m (c) 32m (d) 20m (e) 13m 3. I throw a ball off a cliff 40 meters high. If the ball is thrown horizontally at a speed of 12 m/s, how far will it go before hitting the ground below?…

• 2368 Words
• 10 Pages
Good Essays
• Powerful Essays

3. Acceleration as a function of the accelerated mass 4. Accelerated as a function of force…

• 1951 Words
• 8 Pages
Powerful Essays
• Good Essays

c. An accelerated object's motion will be represented by a curved line on a velocity-time graph.…

• 5360 Words
• 22 Pages
Good Essays
• Powerful Essays

b In moving from C to B, the ant travels a displacement of: 40 − 50 = −10 cm and a distance of 10 cm. c In moving from C to D, the ant travels a displacement of: 70 − 50 = +20 cm and a distance of 20 cm. d In moving from C to E and then to D, the ant travels a displacement of (70 − 50= +20 cm and a distance of: 50 + 30 = 80 cm a The distance travelled is: 50 +30 = 80 km b The displacement = final position – initial position = 20 km north. a The displacement from ground floor to basement is 10 m down. b The displacement from basement to the top floor is 60 m up. c Total distance travelled = 10 m +10 m + 50 m= 70 m d The displacement is the change in position, which is 50 m up. Displacement is the only vector listed here. a…

• 5932 Words
• 24 Pages
Powerful Essays
• Better Essays

7. An electron is projected with an initial speed of 25×105 m/s directly towards a proton which is at rest. Initially the electron is supposed to be at a fairly large distance from the proton. Find the distance of the electron from the proton when its instantaneous speed becomes twice the initial speed.…

• 2764 Words
• 12 Pages
Better Essays
• Powerful Essays

5. A rod has length 100 cm. When the rod is in a satellite moving with velocity 0.9 c relative to the laboratory, what is the length of the rod as measured by an observer (i) in the satellite, and (ii) in the laboratory?.…

• 2690 Words
• 11 Pages
Powerful Essays
• Good Essays

UPSEE - 2009 Full Paper Section-1 Physics 1. If 3.8 × 10-6 is added to 4.2 × 10-5 giving due regard to significant figures, then the result will be : 1) 4.58 × 10-5 2) 4.6 × 10-5 3) 4.5 × 10-5 4) None of these 2. A ball is dropped from a bridge at a height of 176.4 m over a river. After 2 s, a second ball is thrown straight downwards. What should be the initial velocity of the second ball so that both hit the water simultaneously ? 1) 2.45 ms-1 2) 49 ms-1 3) 14.5 ms-1 4) 24.5 ms-1 3. Which of the following are true ? 1. A body having constant speed can have varying velocity. 2. Position time graphs for two objects with zero relative velocity are parallel. 3. The numerical ratio of velocity to speed of an object can never be more than one. 1) 1 only 2) 2 and 3 3) All 4) None of these 4. The centripetal acceleration of a body moving in a circle of radius 100 m with a time period of 2 s will be 1) 98.5 ms-2 2) 198.5 ms-2 3) 49.29 ms-2 4) 985.9 ms-2 5. How many NAND gates are used in an OR gate? 1) Four 2) Two 3) Three 4) Five…

• 8372 Words
• 34 Pages
Good Essays
• Good Essays

Hence determine the equation whose roots are Solve the equations (a) + 2=0. 5. a) A particle moves in a straight line with uniform acceleration f. its initial velocity is U, prove that…

• 788 Words
• 4 Pages
Good Essays
• Good Essays

A The string becomes slack as the smaller object travels faster. B The string remains straight as both objects move with the same velocity due to their inertia.…

• 2305 Words
• 14 Pages
Good Essays
• Good Essays

PHYSICS WORK SHEET - 2 CLASS – IX LESSON : MOTION 1. Analyze the following situation and answer the following questions. A circular track has a circumference of 3140m with AB as one of its diameter. A man riding a scooter moves from A to B along the circular path with a uniform speed of 10 m/s. a) Distance covered by the man b) Displacement of the man c) Time taken by the man in reaching from A to B. 2. A car starting from rest moves with a uniform acceleration of 0.1 m/s2 for 2 minutes. Find the speed acquired by the car. 3. A ship is moving at a speed of 56 km/h. One second later it is moving at 58 km/h. What is its acceleration? 4. A child completes a circular track of 200 m length in 10 seconds. Calculate a) speed, b) velocity. 5. A car travels 10 m in 5 seconds, 20 m in next 10 seconds and 30 m in the last 10 seconds. Find the average speed of the car. 6. A body moving in a circle of radius r covers 3/4th of the circle. Calculate the ratio of distance to displacement. 7. A train is moving with a velocity of 36 km/h. Find the distance travelled by the train in a) 1 hour, b) 1 minute. 8. An electron moving with a velocity of 5×104 ms-1 enters into a uniform electric field and acquires a uniform acceleration of 104 ms-2 in the direction of its initial motion. Calculate the time in which the electron would acquire a velocity double of its initial velocity. 9. A car is running at a speed of 54 km/h. In the next second, its speed is 63 km/h. Find the acceleration. 10. The speed of a motor bike is 60 km/h. Express this speed in m/s and calculate the distance covered by the bike in 5 seconds. 11. A car accelerates uniformly from 15 km/h to 35 km/h in 5 s, find acceleration in (a) km/h2 and (b) m/s2. 12. A train starting from rest attains a velocity of 30 m/s in 3 minutes. Assuming that the acceleration is uniform, find the acceleration. 13. A body moving along a straight line at 20 m/s undergoes an acceleration of 4 m/s2. After 2 seconds what will be its speed?…

• 728 Words
• 3 Pages
Good Essays
• Satisfactory Essays

a b  Suppose a man covers a certain distance at x km/hr and an equal distance at y km/hr. Then,…

• 388 Words
• 2 Pages
Satisfactory Essays
• Good Essays

KINEMATICS 1. An object is moving with uniform accleration. Its velocity after 5 sec is 25m/s and after 8 sec,it is 34 m/s. Find the distance travelled by this object in 12th second. Ans. 44.5 A particle starts with a velocity of 100 cm/s and moves with –2 cm/s2 acceleration. When its velocity be zero and how far will it have gone? Ans. 50s , 25m m/s. After 7 a time interval ∆t, the velocity of the body is reduced by half, and after the same time interval, the velocity is again reduced by half. Determine the velocity (in ms–1 ) vf of the body after a time interval 3∆t from the moment when the constant force starts acting. Ans. 10 A certain constant force starts acting on a body moving at a constant velocity A particle is moving with uniform acceleration, in eighth and thirteenth second after starting it moves through 255 cm and 225 cm respectively. Find its initial velocity and its acceleration. Ans. 300 cm/s, 6 cm/s2 The speed of the train is reduced from 36 km an hour to 9 km per hour whilst it travels a distance of 150 metres, if the retardation be uniform, find how much further it will travel before coming to rest. Ans. 10 m A train takes 5 minutes to cover a distance of 3 km between two stations P and Q. Starting from rest at P, it accelerates at a constant rate to a speed of 40 km/h and maintains this speed until it is brought uniformly to rest at Q. If the train takes three times as long to decelerate as it does to Ans. 15s accelerate, find the time taken by the train to accelerate. A train stops at two stations P and Q which are 2 km apart. It accelerates uniformly from P at 1 m/s2 for 15 seconds and maintains a constant speed for a time before decelerating uniformly to rest at Q. If the deceleration is 0.5 m/s2, find the time for which the train is travelling at a constant speed. Ans. 111 s A car is moving along a straight line. It is taken from rest to a velocity of 20 m/s by a constant acceleration of 5 m/s2. It maintains a constant velocity of 20 m/s…

• 499 Words
• 2 Pages
Good Essays
• Satisfactory Essays

9 A particle P moves in a straight line with displacement relative to origin given by…

• 331 Words
• 2 Pages
Satisfactory Essays