Recent content by Bigdane

Homework Statement A person is riding a bicycle, and its wheels have an angular velocity of +22.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is +11.0 revolutions. (a) How much time does it take for the...

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Water flows over a section of a waterfall at the rate of 3.2 104 kg/s and falls 33 m. How much power is generated by the falling water? watts i tried to use the power equation but I am just not sure how the numbers relate. help please?

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got it. thanks

how do i use it to find the height?

A child and sled with a combined mass of 53.8 kg slide down a frictionless hill that is 8.56 m high. If the sled starts from rest, what is its speed at the bottom of the hill? m/sim not sure how to calculate speed given the information. help please?

how do i factor in the angle?

Tarzan swings on a 23.8 m long vine initially inclined at an angle of 36° from the vertical. (a) What is his speed at the bottom of the swing if he starts from rest? m/s (b) What is his speed at the bottom of the swing if he starts with an initial speed of 2.22 m/s? m/s help please...

im not sure how to find that

A person lifts a 3.7 kg cement block a vertical distance of 1.18 m and then carries the block horizontally a distance of 7.80 m. (a) How much work is done by the person in the process? J (b) How much work is done by gravity in the process? J w=fd?

You swing a 3.22 kg bucket of water in a vertical circle of radius 0.860 m. At the top of the circle the speed of the bucket is 3.30 m/s; at the bottom of the circle its speed is 6.95 m/s. Find the tension in the rope tied to the bucket in the following positions. (a) the top of the circle...

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Mercury has a mass of 3.30 x10^23 kg and a radius of 2.44 x10^6 m. (a) What is the acceleration due to gravity on Mercury? m/s2 (b) How much would a 5.94 kg person weigh on this planet? Ni honestly have no idea how to do this... help please!