physics

posted by .

A student starts from rest from his house and accelerates uniformly at the rate of 2m/sec^2 for 30 sec then he apply break for 45 sec and come to rest at his school.how far is his school

  • physics -

    d = 0.5a*t^2
    d1 = 1*30^2 = 900 m. = Distance traveled in 30 s.
    V = at = 2*30 = 60 m/s = Velocity reached in 30 s.

    a=(V-Vo)/t = (0-60) / 45 = -1.33 m/s^2.
    V^2 = Vo^2 + 2a*d
    0 = 60^2 - 2.66d
    2.666d = 3600
    d2 = 1350 m.

    d1 + d2 = 900 + 1350 = 2250 m. =
    Distance from house to school.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Integration

    Intergrate ¡ì sec^3(x) dx could anybody please check this answer. are the steps correct?
  2. physics

    an object initially at rest accelerates uniformly at 5m/sec^2 until it obtains a speed of 30m/sec. What distance does the object move while accelerating?
  3. physics

    a car traveled at uniform velocity of 20m/sec for 5 sec the brakes are applied and car retards uniformly and come to rest in further 8 sec.find a)distance traveled in first five sec b)distance traveled after breaks are applied c)total …
  4. physics

    a cyclist start from rest and accelerate uniformly to achieve a velocity of 12m/sec in 5 sec.immediately he applied brake and come to rest in next 4 sec .calculate a)distance traveled during acceleration b)distance traveled during …
  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 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 …
  7. 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 …
  8. Physics

    An airplane originally at rest on a runway accelerates uniformly at 6.2 m/s2 for 12 sec. During this 12 sec-interval the air plane travels an approximate distance of?
  9. physics

    a car travelling at constant velocity passes a stationary motorcycle at a traffic light as the car overtakes the motorcycle,the motorcycle accelerates uniformly from rest for 10 sec the following displacement time graph represents …
  10. math word problem

    A high school student created a remote control car that can travel 66 feet in 6 seconds. Express as a unit rate A. 11 feet/sec B. 66feet/sec C. 11sec/feet D. 6 feet/sec

More Similar Questions