physics

posted by .

12.
A particle starts moving from rest with uniform acceleration. it travels a distance x in first 2 sec and a distance y in the next 2 sec .Then
options:
1.y=x
2.y=3x

• physics -

X distance moved in first 2 secs.
=> x=0.2+(1/2).a.2^2= 2a ...(1)

velocity at the end of 2 secs.(say v)
=> v = 0+a.2 = 2a ....(2)

y distance covered in the next 2 secs.
=> y = v.t +(1/2).a.t^2
or y = 2a.2 + (1/2).a.2^2 = 6a ...(2)
From, (1) & (2) y = 3x ...Option (2)

• physics -

a ball dropped on to the floor from a height of 10mrebounds to a height 2.5m. If the ball is in contact with the floor for 0.02s,its avg. acceleration during contact

Similar Questions

1. physics

A cyclist is cycling at uniform velocity of 8m/sec for 8 sec then applies brakes and cycle come to rest in next 10 sec. calculate a)Distance traveled by uniform velocity. b)distance traveled by non-uniform velocity c)total distance …
2. physics

a body moves with a uniform velocity of 2m/sec for 5 sec then velocity was uniformly accelerated and a velocity of 10m/sec was achieved in next 5 sec.then brakes were applied uniformly and body comes to rest in next 10 sec.calculate …
3. physics

a train starts from rest and accelerates uniformly to achieve a velocity of 20m/sec in 10 sec.then train maintains this speed for next 200 sec.the breaks are then applied and train comes to rest in next 50 sec.calculate a)acceleration …
4. physics

a train starts from rest and accelerates uniformly to achieve a velocity of 20m/sec in 10 sec.then train maintains this speed for next 200 sec.the breaks are then applied and train comes to rest in next 50 sec.calculate a)acceleration …
5. physics

a train starts from rest and accelerates uniformly to achieve a velocity of 20m/sec in 10 sec.then train maintains this speed for next 200 sec.the breaks are then applied and train comes to rest in next 50 sec.calculate a)acceleration …
6. physics

A particle starts moving from rest with uniform acceleration.It travels a distance x in first 2 sec and a distance y in the next 2 sec.Then Answer) y=3x
7. physics

A body with uniform acceleration covers 76 m in the 5th sec and 116 m in the 10th sec.Find the distance traveled in the 15th sec.what is the distance traveled in next 5 seconds. As the body is travelling with uniform acceleration so …
8. physics

a particle starts moving from rest with uniform acceleration . it travels a distance y in the next 2 sec
9. physics

a particle at rest starts in horizontal strsight line with uniform acceleration ratio distance during 4th and 3rd sec ond
10. physics

a particle starts from rest and travels a distance x with uniform acceleration, then it travels a distance 2x with uniform speed ,finally it travels a distance of 3x with uniform retardation and comes to rest. If the whole motion of …

More Similar Questions