Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before

Question

Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. He increases his angular velocity at a constant rate beginning from rest (zero) up to maximum at release. The radius of rotation of the hammer is 2.2 meters.

3A - In degrees/second, what is the average angular velocity during the hammer throw?

Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. He increases his angular velocity at a constant rate beginning from rest (zero) up to maximum at release. The radius of rotation of the hammer is 2.2 meters.

3B - Assuming that the angular velocity increases at a constant rate, in degrees/second what is the angular velocity of the hammer at the moment of release?

Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. He increases his angular velocity at a constant rate beginning from rest (zero) up to maximum at release. The radius of rotation of the hammer is 2.2 meters.

3C - In radians/second, what is this angular velocity of the hammer at the moment of release?

Starting from rest, a hammer thrower performs 4 revolutions in 4 seconds before releasing the hammer. He increases his angular velocity at a constant rate beginning from rest (zero) up to maximum at release. The radius of rotation of the hammer is 2.2 meters.

3D - In meters/second, what is the linear velocity of the hammer at the moment of release?

Explanation / Answer

a) avg and vel.= 4*460/4 = 360 deg/s

b) 720 deg/s

a)let d be the ang accn.

so w=d*4 and 8pi = .5d(16) ...=> d= pi ..

so w = 4pi rad/s after 4 sec...

D) V = 2.2*4pi = 8.8 pi m/s

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.