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Q1. The clocks and watches which are used for measuring time are based on:

(a) rectilinear motion
(b) circular motion
(c) periodic motion
(d) quartz crystals

Q2. The regular vibrations of which of the following electrically driven crystals are used for measuring time very accurately

(a) calcite crystals
(b) quadric crystals
(c) chrome crystals
(d) quartz crystals

Q3. Which of the following cannot be a unit of speed

(a) km/h
(b) s/m
(c) m/s
(d) mm/s

Q4. Speed of a body is measured in

(a) metre
(b) kilometre
(c) metre/second
(d) metre/sec2

Q5. An archer practicing with an arrow bow shoots an arrow straight up two times. The first time the initial speed is v0 and second time he increases the initial sped to 4v0. How would you compare the maximum height in the second trial to that in the first trial?

(a) Two times greater
(b) Four times greater
(c) Eight times greater
(d) Sixteen times greater

Q6. A tennis ball is dropped from the top of a tall building. A second tennis ball is thrown down from the same building. Make a statement about the acceleration of each tennis ball.

(a) The first ball falls with a greater acceleration
(b) The second ball falls with a greater acceleration
(c) They both fall with the same acceleration because they stated from the same height
(d) The both fall with the same acceleration because they are in a free fall

Q7. Two baseballs are thrown from the roof of a house with the same initial speed, one is thrown up, and the other is down. Compare the speeds of the baseballs just before they hit the ground.

(a) one thrown up moves faster because the initial velocity is up
(b) The one thrown down moves faster because the initial velocity is down
(c) They both move with the same speed
(d) The one thrown up moves faster because it has greater acceleration

Q8. A package is dropped from an air balloon two times. In the first trial the distance between the balloon and the surface is H and in the second trial 4H. Compare the time it takes for the package to reach the surface in the second trial to that in the first trial?

(a) The time in the second trial is four times greater
(b) time in the second trial is two times greater
(c) The time the same in both trials because it doesn’t depend on height
(d) time in the second trial is four times less

Q9. A football, a hockey puck, and a tennis ball all fall down in the absence of air resistance. Which of the following is true about their acceleration?

(a) acceleration of the football is greater than the other two
(b) The acceleration of the hockey puck is greater than the other two
(c) The acceleration of the tennis ball is greater than the other two
(d) They all fall down with the same constant acceleration

Q10. An object is released from rest and falls in the absence of air resistance. Which of the following is true about its motion?

(a) . Its acceleration is zero
(b) Its acceleration is constant
(c) Its velocity is constant
(d) Its acceleration is increasing


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A Boat Travels 50 Km Due East, Then 120 Km Due North And Finally It Comes Back To The Starting Point Through The Shortest Distance.

Modified 20 Year Ago

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A Boat Travels 50 Km Due East, Then 120 Km Due North And Finally It Comes Back To The Starting Point Through The Shortest Distance.

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An Object Is Dropped From Rest. Its V-t Graph Is

Modified 15 Year Ago

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An Object Is Dropped From Rest. Its V-t Graph Is

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Three Identical Particles Are Joined Together By A Thread As Shown In Figure

Modified 200 Year Ago

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Three Identical Particles Are Joined Together By A Thread As Shown In Figure

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In 1.0s, A Particle Goes From Point A To Point B

Modified 200 Year Ago

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In 1.0s, A Particle Goes From Point A To Point B

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A Cyclist Turns Around A Curve At 15 Miles/hour

Modified 217 Year Ago

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A Cyclist Turns Around A Curve At 15 Miles/hour

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A Wheel Of Radius 1 M Rolls Forward Half A Revolution On A Horizontal Ground. The Magnitude To The Displacement Of The Point Of The Wheel Initially In Contact With The Ground Is

Modified 13 Year Ago

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391
13 Year Ago

A Wheel Of Radius 1 M Rolls Forward Half A Revolution On A Horizontal Ground. The Magnitude To The Displacement Of The Point Of The Wheel Initially In Contact With The Ground Is

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