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Consider a tennis ball that is hit by a player at the baseline with a horizontal velocity of 50 m/s (about 110 mi/h). The ball travels as a projectile to the player's opponent on the opposite baseline, 24 m away, and makes 30 complete revolutions during this time. What is the ball's angular velocity?
During liftoff, a hot-air balloon accelerates upward at a rate of 3.5. What is the magnitude of the object's acceleration after it is released (relative to the ground)
Calculate the torque on the center of mass of the rod alone with respect to the pivot point.(in N*m)? Calculate the unknown mass.(in kg).
A cube of ice is taken from the freezer at -8.5°C and placed in a 97 g aluminum calorimeter filled with 292 g of water at room temperature of 20°C. The final situation is observed to be all water at 18°C. What was the mass of the ice cube?
Four objects are situated along the y axis as follows: a 2.13 kg object is at +3.28 m, a 3.34 kg object is at +2.40 m, Where is the center of gravity of this system
A lamp that plugs into a 120V wall socket can use either a 60W or 100W bulb. Which bulb has the higher resistance
High speed stroboscopic photographs show that the head of a 246 g golf club is traveling at 56.2 m/s just before it strikes a 47.0 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
The second hand of a clock has a length of 0.30 m. Evaluate what distance does the tip of the second hand sweep through in 3 minutes and 45 seconds?
A machine has an 650 g steel shuttle that is pulled along a square steel rail by an elastic cord (see figure below). The shuttle is released when the elastic cord has 16 N tension at a 45° angle
The engine of a model rocket accelerates the rocket vertically upward for 2.0 s as follows: At t = 0, the rocket's speed is zero; at t = 1.0 s, determine the instantaneous acceleration of the rocket at t = 1.5 s
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 32 cans of soda which are warm at 87.7°F. how much ice needs to be added to your cooler
a train is traveling down a straight track at 27 ms when the engineer applies the brakes resulting in an acceleration
A block of unknown mass is attached to a spring of spring constant 7.9 N/m and undergoes simple harmonic motion with an amplitude of 13.2 cm. Calculate the mass of the block
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