maths/physics

posted by .

Two objects are thrown simultaneously from the same height at 45° angles to the vertical with a
speed of 20 m per second; one up, the other one down. Find the difference between the heights the
objects will be at two seconds later. How are these objects moving in regards to one another?

  • maths/physics -

    Y1 = 20 sin45*t - (g/2)t^2
    Y2 = -20 sin45*t -(g/2)t^2

    Y1 - Y2 = 40 sin45*t = 56.6 m apart

    V1 = 20 sin45 - gt
    V2 = -20 sin45 - gt

    The vertical velocity difference between them remains
    V2 - V1 = -40 sin 45 = -28.3 m/s

    Two seconds after release, both are going down, but V2 is going down faster.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A first object is thrown vertically upward with some initial speed and some initial height above the ground. Simultaneously, a second object is thrown straight down with the same initial speed and same initial height above the ground. …
  2. physics

    two objects are thrown from the top edge of a cliff with a speed of 10 m/s. one object is thrown straight down and the other straight up. if the first object hits the ground in 4.0 second, the second hits the ground in ________ seconds …
  3. Physics

    A rock is dropped from a height of 100 meters above the ground. One second later, a ball is thrown vertically downwards, from the same height, with an initial speed of 13 m/s. How long after the ball is thrown will the two objects …
  4. Physics

    A rock is dropped from a height of 100 meters above the ground. One second later, a ball is thrown vertically downwards, from the same height, with an initial speed of 13 m/s. How long after the ball is thrown will the two objects …
  5. Physics***

    1) Assume that you have two objects one with a mass of 10 kg and the other with a mass of 15 kg each with a charge of +3.0x10^-6 C and separated by a distance of 2 m. What is the electric force that these objects exert on one another?
  6. physics

    2)Two objects are initially the same height above the ground. Simultaneously, one is released from rest and the other is shot horizontally with an initial speed of 2.5 m/s. The two objects collide after falling 20.0 m. How far apart …
  7. physics

    2) Two objects are initially the same height above the ground. Simultaneously, one is released from rest and the other is shot horizontally with an initial speed of 2.5 m/s. The two objects collide after falling 20.0 m. How far apart …
  8. Child development

    Infants' naïve theory of physics leads them to believe that A.gravity is not important so floating objects are not unusual. b.one object striking a second object does not affect the second object. c.objects cannot move through other …
  9. Child development

    Infants' naïve theory of physics leads them to believe that a.gravity is not important so floating objects are not unusual. b.one object striking a second object does not affect the second object. c.objects cannot move through other …
  10. Physics

    Hello, my problem is the next one: There are three objects that are launched at the Same time But with different angles( they describe proyectile motion ) . All the objects got the Same maximun height. My question is: Is the Initial …

More Similar Questions