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Get college assignment help at uniessay writers If the kangaroo leaves the ground at a 21 angle, what is its takeoff speed ?

An athlete at the gym holds a 1.4 kg steel ball in his hand. His arm is 74 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? (a) Straight out to his side, parallel to the floor 1 N m (b) Straight, but 40° below horizontal 2 N m

A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. What will be it’s speed when it strikes the ground below?

A peg is located a distance h directly below the point of attachment of the cord. If h = 0.70 L, what will be the speed of the ball when it reaches the top of its circular path about the peg? (Use the following as necessary: g and L.)

A uniform cylindrical soda can of mass 0.140kg is 12.0 cm tall and filled with 1.31kg of soda. Small holes are drilled in the top and bottom to drain the soda. a.) What is the height h of the center of mass of the system as a function of x, where x is the height of the soda remainin in the can? b.) What are the maximum and minimum values for h (i.e. what is h when the can is full and empty)? c.) What is the smalles value of h that occurs while the can is draining?

Through what angle in degrees does a 33 rpm record turn in 0.25s?

The blocks A and B are connected by a piece of spring. Block B rests on a smooth inclined plane of 21 degrees and block A hangs vertically. Calculate the acceleration of the system if the mass of block A is 1.08 kg and that of block B is 5.9 kg.

A quantity of a gas has an absolute pressure of 400 kPa and an absolute temperature of 110 degrees kelvin. When the temperature of the gas is raised to 235 degrees kelvin, what is the new pressure of the gas?

2.00 × 1019 electrons flow through the cross section of a wire in 2.11 s. What current (in A) does this correspond to?

A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is mus= 0.320, and the coefficient of kinetic friction is muk= 0.190. The angle of elevation theta is increased slowly from the horizontal. At what value of theta does the block begin to slide (in degrees)?

Get college assignment help at uniessay writers An Alaskan rescue plane traveling 49 m/s drops a package of emergency rations from a height of 118 m to a stranded party of explorers. Where does the package strike the ground relative to the point directly below where it was released?

An explorer is caught in a whiteout while returning to base camp.He was supposed to travel due north for 5.6km, but he actuallytraveled 7.8km at 50 degrees north due east. (a) how far and (b) in what direction must he now travel to reachbase camp?

a 70 kg person throws a .05 kg snowball forward with a ground speed of 35 m/s. a second person, with mass 60 kg catches the snowball. both people are on skates. the first person is initially moving forward with a speed of 2.3 m/s the second is initially at rest. what are the final velocities of the people? disregard friction between the skates and the ice.

please answer for me the attached. ———- Automobile engine slows down from 4500rpm to 1200rpm in 2.5 s. Calculate (a) its angular acceleration, assumed constant, and (b) the total number of revolutions the engine makes in this time. Pilots can be tested for the stresses of flying high speed jets in a whirling “human centrifuge,” Which takes 1.0 min to turn through 20 complete revolutions before reaching its final speed. (a) What was its angular acceleration (assumed constant) and (b) what was its final angular speed in rpm. A small 650 gram ball on the end of a thin, light rod is rotated in a horizontal circle of radius 1.2m. Calculate (a) moment of inertia of the ball about the center of the circle, and (b) the torque needed to keep the ball rotating at constant angular velocity if air resistance exerts a force of 0.020N on the ball. Ignore the rod’s moment of inertia and air resistance.

A candle is placed 15.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 8.5 cm farther away from the mirror. Find the focal length of the convex mirror.

a projectile is fired staright upward at 141m/s. How fast is it moving at the instant it reaches the top of trajectory? How long does it take the projectile to reach the top of its trajectory? How high does the projectile go before it begins to fall?

A projectile is fired straight upward at 146 m/s. How fast is it moving at the instant it reaches the top of its trajectory?

Block 1, of mass = 9.90 kg, moves along a frictionless air track with speed = 13.0 m/s. It collides with block 2, of mass = 27.0 kg, which was initially at rest. The blocks stick together after the collision. Find the magnitude of the total initial momentum of the two-block system. (kg*m/s) Find , the magnitude of the final velocity of the two-block system.

A chair of weight 115 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 42.0 directed at an angle of 34.0 below the horizontal and the chair slides along the floorcalculate ,what is the magnitude of the normal force that the floor exerts on the chair.

Starting in the spring, fruit begins to grow on the outer end of a branch on a pear tree. Explain how the center of gravity of the pear growing branch shifts during the course of the summer. Suppose you are standing on a train, both feet together, facing a window. The front of the train is to your left. The train starts moving foward. To keep from falling, you slide your right foot out toward the rear of the train. Explain in terms of torque how this actions keeps you from falling over.

An Alaskan rescue plane traveling 44 m/s drops a package of emergency rations from a height of 160 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s2 . Where does the package strike the ground relative to the point directly below where it was released? Answer in units of m.

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November 3, 2019