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An object starts with initial velocity u...

An object starts with initial velocity u and attains final velocity v. The velocity it changing at a uniform rate. Write an expression for average speed.

Text Solution

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Average speed `=(u+v)/2`
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Knowledge Check

  • A particle of mass m strikes a wall normally with a velocity v and then its velocity reversed. The change in momentum is :

    A
    m`upsilon`
    B
    2m`upsilon`
    C
    zero
    D
    - 2m`upsilon`
  • A projectile is fired with a velocity v at angle theta with the horizontal. The magnitude of the change in momentum between the starting point and the point at which it strikes is given by :

    A
    2 mv cos `theta`
    B
    2 mv sin `theta`
    C
    2mv
    D
    Zone
  • A stone is thrown with a velocity v at an angle theta with the horizontal. Its speed when it makes an angle beta with the horizontal is :

    A
    v cos `theta`
    B
    `v/(cos beta)`
    C
    v cos `theta` cos `beta`
    D
    `(v cos theta)/(cos beta)`
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