Physics
posted by Tracy .
A simple pendulum 1.50 m in length has a 500g putty ball as an end bob. The pendulum is pulled aside 60° from the vertical and given an initial tangential speed of 1.20 m/s. At the bottom of the arc path, the bob hits and sticks to a 200g putty ball sitting on a tee. (a) Determine the speed of the 500g ball just before it hits the 200g ball and the speed of the combined masses right after they stick together. (b) How much mechanical energy is lost in the collision? (c) What is the maximum angle to which the combined balls swing on the other side?

find the initial height of the bob from the angle and the length.
Then, find total initial energy (KE+GPE)
at the bottom of the swing, all that energy is KE, find the velocity.
Then, at the bottom, use conservation of momentum to find combined velocity.
At That point, you need to caculate energies. 
i did that for part a but i got 2.73 and the answer says its 2.87

wait nevermind i got it. i put in the wrong number. thanks :D
Respond to this Question
Similar Questions

Physics
The length of a simple pendulum is 0.72 m, the pendulum bob has a mass of 305 grams, and it is released at an angle of 10° to the vertical. a) With what frequency does it vibrate? 
physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45^\circ below the horizontal and is given an initial downward speed of 1.50 m/s. At the bottom of the arc, determine … 
physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45^\circ below the horizontal and is given an initial downward speed of 1.50 m/s. At the bottom of the arc, determine … 
Physics
A simple pendulum consists of a light string 1.70 m long with a small 0.490 kg mass attached. The pendulum starts out at 45^\circ below the horizontal and is given an initial downward speed of 1.50 m/s. At the bottom of the arc, determine … 
Physics
a 9.50g bullet. moving horizontally with an initial speed vi , embeds itself in a 1.45kg pendulum bob that is initially at rest. The length of the pendulum is L=0.745m. After the collision, the pendulum swings to one side and comes … 
physicsURGENT
An 85 cm long pendulum with a 0.80 kg bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, the speed of the bob is 2.8 m/s. What angle does the pendulum make with the vertical when … 
physics
¬Calculate the period of oscillation of a simple pendulum of length 1.8 m, with a bob of mass 2.2 kg. What assumption is made in this calculation? 
Physics Ballistic pendulum
A simple pendulum is made from a 2 kg. block of wood suspended from a light cord of length 1 m. When the pendulum is hanging in such a way that it is stationary and vertical, a bullet is shot horizontally into the block of wood where … 
Physics
A pendulum bob has a mass of 1kg. The length of the pendulum is 2m. The bob is pulled to one side to an angle of 10degree from the vertical. What is the velocity of the pendulum bob as it swings through it's lowest point? 
science
Calculate the period of oscillation of a simple pendulum of length 1.8 m, with a bob of mass 2.2 kg. What assumption is made in this calculation?