Mechanics | Relativity Answers

What is the average power output of a weightlifter who can lift 220 kg to a height of 1.7 m in 1.9 s?

The balloonist was travelling at 62.6 m/s when the parachute opened. a) What was the average acceleration? b) Why was the value of the average less than that for gravity?

A power lift chair can raise a 182 kg person a distance of 1.50 m in 12 seconds.

What is the power of the lift chair?

An object is thrown horizontally at velocity 40m/s making an angle 60 dgree with the horizontal plane. find the maximum height and horizontal range

A house is 50.0 ft long and 26 ft wide and has 8.0-ft-high ceilings. What is the volume of the interior of the house in cubic meters and in cubic centimeters?

A 0.75 ball is tied to a 0.50 m long string and whirled in a vertical circle at a constant speed of 5m/s. What is the tension in the string at the top and the bottom of the circle?

If I have coefficient of friction and degree of incline and distance traveled, how do I figure acceleration?

(1) A 1,500 kg car is moving along a level road of 60 km/h. What work is required to stop the car?

(2) At room temperature, an oxygen molecule, with mass 5.31 x 10^(–26) kg, typically has a kinetic energy of 6.21 x 10^(–21) J. How fast is the molecule moving?

(3) A 7.0-kg monkey swings from one branch to another 1.2 m higher. What is the change in potential energy? (acceleration due to gravity g = 9.80 m/s2)

A bacterium moves with a speed of 1.6 µm/s across a petri dish with radius
r = 9.1 cm.
How long does it take the bacterium to traverse the petri dish along its diameter?

Two plates of size 100 mm by 50 mm are separated with a 1 mm thick fluid in between. The top plate is moving to the right with a constant velocity of 10 m/s in response to a force of 3 N. The bottom plate is stationary. Determine the viscosity of the fluid by assuming a linear velocity distribution.