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A professor's office door is 0.96m wide, 2.2mhigh, 4.0cm thick; has a mass of 26kg , and pivots on frictionless hinges. what is its angular acceleration immediately afterward
Sarge notices that the cable is susceptible to vibrations. He drives the rope at a frequency such that the center of the span goes through the largest amount of motion. What frequency does Sarge dri
A projectile is launched at an angle of 45° above the horizontal. What is the ratio of its horizontal range to its maximum height
A yo-yo is made from two uniform disks, each with mass m and radius R, connected by a light axle of radius b. Find the angular acceleration of the yo-yo
An aluminum wire having a cross-sectional area equal to 4.90 10-6 m2 carries a current of 8.00 A. Find the drift speed of the electrons in the wire
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
You have to move your 900N couch before a delivery company drops off your new one. How much does your roommate weigh
A spring is oscillating with a frequency of 1.7Hz. 3.9 seconds after the spring is released it is -20cm from equilibrium. Find the amplitude of the spring
The Space Shuttle travels at a speed of about 7.6 × 103 m/s. The blink of an astronaut's eye lasts about 110 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink
A jet plane flying at a constant speed v at an altitude h = 10 km is being tracked by radar located at O directly below the line of flight. determine the value of r at this instant and the magnitude
You have been employed by the local circus to plan their human cannonball performance. For this act, a spring loaded cannon will shoot a human projectile, the Great Flyinski, across the big top to t
If the initial speed of the ball is doubled, how does the maximum height change
A cord with a mass of 500g is tied between two supports. The tension in the cord is 35N and it takes a wave 0.55s to travel from one end to the other. How long is the cord
A tank of a car holds 16 gallons , a liter is .264 gallons, 1 inch equal 2.54 cm, and 1mile equal 1609 m, how many km can it travel on one tank if it gets 25mpg
You are designing a delivery ramp for crates containing exercise equipment. Calculate the maximum force constant of the spring
a bicyclist starts a sprint with an initial speed of 2.0m/s, she moves a constant acceleration, how long did it take the bicyclist to complete the race
A microwave oven of mass 12.5kg is pushed a distance 8.00m up the sloping surface of a loading ramp inclined at an angle of 36.2? above the horizontal, What is the work done on the oven by the force
A 130kg mail bag hangs by a vertical rope 3.6mlong. A postal worker then displaces the bag to a position 2.2m sideways from its original position, What horizontal force is necessary to hold the bag
A body is moving with velocity of 8m/s. After 5 Seconds the velocity of the body becomes 18m/s. Find the acceleration of the body
A cue ball, which has a mass of 0.17 kg, collides head-on with a stationary 8-ball, what was the velocity of the cue ball before and after collision
Suppose the same masses are used for a force table experiment as were used in Part 1, but each pulley is moved 180° so that the 0.100 kg mass acts at 200°, and the 0.200 kg mass acts at 270&
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/37 s. If the operator then brings it to a stop in 3.2 min, what is the angular acceleration of the Ferris wheel
A space station in the form of a large wheel, 311m in diamter, rotates to provide an "artificial gravity" of 5.2m/s^2 for people located on the outer rim. Find the rotational frequency of the wheel
A 4-kg ball traveling to the right with a speed of 4 m/s collides witha 5-kg ball traveling to the left with a speed of 2 m/s. What is the total momentum of the two balls before they collide