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A rocket is fired straight up and accelerates upward at 12 m/s2 for 18 seconds. The rocket then runs out of fuel and coasts still going up. Ignore any air resistance effects on the rocket and use -9.8 m/s2 for the local acceleration due to gravity. a) What is the rocket’s maximum altitude? b) At the maximum height the rocket ejects a 55.0 kg scientific package which falls straight down with an average constant retarding force of 175 N. What is the package’s speed when it hits the ground?
A generator supplies 140 V to a transformer's primary coil, which has 70 turns. If the secondary coil has 610 turns, what is the secondary voltage
in order to stop a 1500kg car that is originally moving at 25m/s, and if the car stops over a distance of 50m, what average force must act on the car
A rider on a motorcycle that hass a mass of 195 kg is traveling with a speed of 24 m/s. What is the approximate total rational kinetic energy of the wheels
A cardinal (Richmondena cardinalis) of mass 4.50×10?2 kg and a baseball of mass 0.144 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
A 1650-kg car is travelling at 31.2 m/s. How fast must a 91.0-kg bicycle and rider be travelling to have the similar kinetic energy as the car.
a small motor draws a current of 1.75 A from a 120.0 V line. It costs $35.81 to operate the motor for 4.00 hrs at $0.0600 /kWh. What is the power output of the motor
A rope is used to pull a block a horizontal distance of 50 metres. If the rope tension is 120 N, What is the work done on the box
Bead A has a mass of 14g and a charge of -4.5nC . Bead Bhas a mass of 28g and a charge of -11.8nC. What maximum speed is achieved by each bead
a silver dollar of mass 200gm, and diameter 8cm, has a small hole punched through it at 2 cm from the center. the coin is initially at rest in a vertical plain with the hole directly under the center, what is the angular velocity of the coin at its..
A 11.0-g wad of sticky clay is hurled horizontally at a 130-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 11.0 kV
In 0.749 s, a 9.43-kg block is pulled through a distance of 4.84 m on a frictionless horizontal surface, starting from rest. By how much does the spring stretch
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