0 A puck of mass m 1.50 kg slides in a circle of radius r-20.0 cm on a frictionl

Question

0 A puck of mass m 1.50 kg slides in a circle of radius r-20.0 cm on a frictionless table while attached to a hanging cylinder of mass M= 2.50 kg by a cord through a hole in the table. What speed keeps the cylinder at rest? M /30 You throw a ball toward a wall at speed 25.0 m/s and at angle ,-40.0° above the horizontal. The vall is distance d- 22.0 m from the release point of the ball. (a) How far above the release point does the ball hit the wall? What are the (b) horizontal and (c) vertical components of its velocity as it hits the wall? (d) When it hits, has it passed the highest point on its trajectory? V 25.Omls

Explanation / Answer

here,

m = 1.5 kg

r = 20 cm = 0.2 m

M = 2.5 kg

let the speed of cyclinder be v and tension in the cord be t

for M

t = M * g ....(1)

and

for m

m * v^2 /r = t

m * v^2 /r = M * g

1.5 * v^2 /0.2 = 2.5 * 9.81

solving for v

v = 1.8 m/s

the speed of m is 1.8 m/s

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