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Acceleration



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Q1. A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25kg. What is the minimum acceleration with which the monkey can climb up along the rope? (g = 10m/s2)

(a) 5m/s2
(b) 10m/s2
(c) 25m/s2
(d) 2.5m/s2

Q2. A gun fires a bullet of mass 50g with a velocity of 30m/s. Because of this, the gun is pushed back with a velocity of 1m/s. The mass of the gun is?

(a) 5.5kg
(b) 3.5kg
(c) 1.5kg
(d) 0.5kg

Q3. Acceleration of an object happens when things ________

(a) slow down
(b) go faster
(c) change direction
(d) All of the above

Q4. In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal? i. If the car is moving on a straight road ii. If the car is moving in circular path iii. The pendulum is moving to and fro iv. The earth is moving around the sun

(a) only(ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) only (i)

Q5. In a free fall the velocity of a stone is increasing equally ion equal intervals of time under the effect of gravitational force of the earth. Then what can you say about the motion of this stone? Whether the stone is having:

(a) Uniform acceleration
(b) Non-uniform acceleration
(c) Retardation
(d) Constant speed

Q6. A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform acceleration of – 0.5 m/s2. Find how far the car will go before it is brought to rest?

(a) 8100 m
(b) 900 m
(c) 625 m
(d) 620 m

Q7. When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:

(a) 2 m/s2
(b) - 2 m/s2
(c) - 0.5 m/s2
(d) 0.5 m/s2

Q8. Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is:

(a) At rest
(b) Moving with no acceleration
(c) In accelerated motion
(d) Moving with uniform velocity

Q9. Change in speed over a given period of time is

(a) velocity
(b) motion
(c) speed
(d) acceleration

Q10. A car, with an initial speed of 3m s?13m s?1 accelerates at a rate of 0m s?20m s?2 for 10 seconds. What is the speed of the car after the 10 seconds?

(a) 30m s?1
(b) 13m s?1
(c) 3m s?1
(d) 0m s?1


0 votes
1 Answer
435 views

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Modified 18 Year Ago

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18 Year Ago

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

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

Modified 203 Year Ago

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203 Year Ago

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

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

Modified 203 Year Ago

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

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1 Answer
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A Cyclist Turns Around A Curve At 15 Miles/hour

Modified 220 Year Ago

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220 Year Ago

A Cyclist Turns Around A Curve At 15 Miles/hour

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1 Answer
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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 16 Year Ago

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392
16 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

0 votes
1 Answer
388 views

A Ball Is Dropped From A Bridge At A Height Of 176.4 M Over A River. After 2s, A Second Ball Is Thrown Straight Downwards. What Should Be The Initial Velocity Of The Second Ball

Modified 24 Year Ago

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24 Year Ago

A Ball Is Dropped From A Bridge At A Height Of 176.4 M Over A River. After 2s, A Second Ball Is Thrown Straight Downwards. What Should Be The Initial Velocity Of The Second Ball

0 votes
1 Answer
380 views

Which Of The Following Are Correct?

Modified 24 Year Ago Tara

380
Tara
24 Year Ago

Which Of The Following Are Correct?

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