Physics, 19.02.2020 19:24 harleymichaelbp74jsq

A stone is thrown from a rooftop at time t=0 seconds. Its position at time t is given by r⃗ (t)=8ti−3tj+(24.5−4.9t^2)k. The origin is at the base of the building, which is standing on flat ground. Distance is measured in meters. The vector i points east, j points north, and k points up.

a) How high is the rooftop?

(b) When does the stone hit the ground?

(c) Where does the stone hit the ground? (in meters)

(d) How fast is the stone moving when it hits the ground?

Answers: 3

Show answers

Another question on Physics

Physics, 21.06.2019 16:10

According to the phase diagram for water, how is the state of water determined? proceed up a vertical line at any given temperature read the phase at the intersection of any given temperature and pressure at a given pressure, proceed horizontally to the s-l or l-g line

Answers: 2

Answer

Physics, 21.06.2019 19:40

Ogle–2013–blg–0723 is an exoplanet that is similar to earth in size and proximity to its star. this exoplanet has mass m=4.18×1024kg and radius r=5.66×106m. an astronaut whose weight on earth is w=735n lands on the planet. a. calculate m, the mass of the astronaut. b. calculate gp? , the acceleration due to gravity on the surface of ogle–2013–blg–0723. c. calculate wp? , the weight of the astronaut on the surface of ogle–2013–blg–0723. d. calculate v, the minimum velocity required to put an object into orbit above ogle–2013–blg–0723. e. calculate t, the time required to complete an orbit around ogle–2013–blg–0723.

Answers: 3

Answer

Physics, 22.06.2019 04:30

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Answers: 2

Answer

Physics, 22.06.2019 05:30

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

Answers: 1

Answer

You know the right answer?

A stone is thrown from a rooftop at time t=0 seconds. Its position at time t is given by r⃗ (t)=8ti−...

Questions