Physics, 18.01.2020 04:31 aaburto1515

An attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.4m/s from a height of 1.55m above the ground.

a) will the rock reach the top?
b) if so what is its speed at the top? if not, what initial speed must it have to reach the top?
c) find the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 7.4 m/s and moving between the same two points.
d) does the change in speed of the downward moving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations?
e) why does this agree or not agree.

Answers: 2

Show answers

Another question on Physics

Physics, 21.06.2019 21:00

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

Answers: 2

Answer

Physics, 22.06.2019 15:50

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Answers: 1

Answer

Physics, 22.06.2019 17:40

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.

Answers: 2

Answer

Physics, 23.06.2019 01:00

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

Answers: 2

Answer

You know the right answer?

An attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.4m/s fro...

Questions