physics

posted by aly

The physics of a golf ball and kinetic energy.
When a 0.045 kg golf ball takes off after being hit, its speed is 41 m/s.
a) What is the kinetic energy of the ball after it has been hit?
b) How much work is done on the ball by the club?
c) Assume that the force of the club acts parallel to the motion of the ball and that the club is in contact with the ball for a distance of 0.010 m. Ignore the weight of the ball and determine the average force applied to the ball by the club?
d) In moving through the air, the golf ball slows down to a speed of 31 m/s. What work has the air done on the ball?
e) If the ball travelled through the air a distance of 84 m, what must be the average force of resistance caused by the air?

  1. Damon

    a
    Ke = (1/2) m v^2 = (.045/2)(41)(41)

    b
    Work in = increse in energy = Ke = answer to a

    c
    F * d = work = same Ke

    d
    new Ke = (.045/2)(31)(31)
    so answer = this - answer to a
    which is negative, force opposite to motion

    e
    again work done = change of energy = F (84)

Respond to this Question

First Name

Your Answer

Similar Questions

  1. physics - please help

    A golf ball of mass 0.045 kg is hit off the tee at a speed of 48 m/s. The golf club was in contact with the ball for 5.4 10-3 s. (a) Find the magnitude of the impulse imparted to the golf ball. (b) Find the magnitude of the average …
  2. physics

    When a 0.045 kg golf ball takes off after being hit, its speed is 35 m/s. A)How much work is done on the ball by the club?
  3. physics

    After a golf ball is hit it takes off with an initial speed of 22.0 m/s and at an angle of 38.0° with respect to the horizontal. The golf field is flat and horizontal. Neglecting air resistance how far will the golf ball fly?
  4. Physics

    How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s?
  5. physics

    A 10.67 kg bowling ball has speed 4.35 m/s before hitting the floor. A(n) 66.5 g golf ball flies at much higher speed, so the two balls have exactly same kinetic energy. What is the speed of the golf ball?
  6. physics

    A 10.67 kg bowling ball has speed 4.35 m/s before hitting the floor. A(n) 66.5 g golf ball flies at much higher speed, so the two balls have exactly same kinetic energy. What is the speed of the golf ball?
  7. physics

    Tiger Woods can hit a golf ball quite hard. A golf ball just after being hit by Mr. Woods has a kinetic energy of 100 J and a momentum of 3 kg m/s. What is the mass of the golf ball in grams?
  8. Physics 1

    A golf ball of mass 125 g hits a billiards ball of mass 172.5 g that is initially at rest. After the collision, the golf ball moves to the right at a speed of 10 cm/s. The billiards ball moves to the left with a speed of 58 cm/s. (a) …
  9. physics

    A golf ball of mass 125g hits a billards ball of mass 172.5g that is initially at rest. after the colision, the golf ball moves to the right at a speed of 10cm/s. the billards ball moves to the left with a speed of 58 cm/s. (a) What …
  10. Math

    The graph represents the height y, in feet, above the ground of a golf ball x seconds after it is hit. The maximum height of the golf ball occurs at x = 2. For up to 2.5 s after the ball is hit, its height is increasing. The maximum …

More Similar Questions