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Q. An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel. The flywheel is a solid disk with a mass of 88.0 kg and a radius R = 0.625 m. It turns on a frictionless axle. Its pulley has much smaller mass and a radius of 0.230 m. The tension Tu in the upper (taut) segment of the belt is 152 N, and the flywheel has a clockwise angular acceleration of 1.67 rad/s2. Find the tension in the lower (slack) segment of the belt.
Q. A gas expands when 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
What is the overall change in the internal energy of the gas?
A golfer takes two putts to get his ball into the hole once he is on green. The first putt displaces the ball into the ball 6.7 m east, and the second 2.16 m south. What displacement would have been needed to get the ball into the hole on first putt.
With two fingers, you hold an ice cream cone motionless upside down the mass of the cone is m, and the coefficient of static friction between your fingers and the cone is? When viewed from the side, the angle of the tip is 2?
0.75 kg block of ice is sliding by you on a very slippery floor at 2.5 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.003 seconds. The block eventually slides at an angle of 22 de..
An object of mass "m" is thrown up an inclined plane of angle "theta" with an initial velocity "v knot". If the motion is resisted by retarding force Fr=-kv (where k is a force coefficient and v the velocity of the object.)
A duck has a mass of 2.6 kg. As the duck paddles, a force of 0.11 N acts on it in a direction due east. In addition, the current of the water exerts the force of 0.12 N in a direction of 44° south of east. When these forces begin to act, the velocity..
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2.
You're carrying a 4.0-m-long, 25 poles to a construction site when you choose to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force should you exert to keep pole motionles..
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
What is direction of the resultant velocity
A 1.86- sound wave travels through the pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as heart beats. The reflected sound is after that mixed with the transmi..
A tennis player places a 40 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.052 kg tennis ball horizontally with a velocity of 30.6 m/s toward the north. What will be the final velocity of the machine.
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