Physics, 19.12.2019 04:31 s5177

A62 kg skier is moving at 6.5 m/s on frictionless horizontal snow-covered plateau when she encounters a rough patch 3.50 m long. the coefficient of kinetic friction between this patch and her skis is 0.30. after crossing the rough patch and returning to friction free snow, she skis down an icy frictionless hell 2.5 m high. a) how much work is done by friction in crossing the patch? b) how fast is the skier moving when she gets the bottom of the hill? [hint: b) use the conservation of total

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 21:30

Janelle made a hypothesis bout the uneven temperatures inside her house during winter. she believes that 50% of the ducts are blocked and she plans to investigate. if she wants to prove her hypothesis using scientific processes what should she do next?

Answers: 2

Answer

Physics, 22.06.2019 06:00

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒

Answers: 3

Answer

Physics, 22.06.2019 11:30

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

Answers: 1

Answer

Physics, 22.06.2019 13:50

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

Answers: 3

Answer

You know the right answer?

A62 kg skier is moving at 6.5 m/s on frictionless horizontal snow-covered plateau when she encounter...

Questions