The correct answer would be 1.7 m/s:
Start with what you know. In the y-direction, we know the jumper must fall 15 meters and starts with 0 velocity in the y direction. You can also assume that the acceleration of gravity is pulling down on the jumper at 9.8 m/s. Once you have these three you can plug it into kinematic a equation to find time
x=Vot+1/2at^2
15=(0)t+1/2(9.8)(t)^2
t=1.75
You get time=1.75 seconds. Since this is a kinematics problem, both the x and y direction have the same amount of time. You can then see that the x displacement is 3 to avoid the rocks, and acceleration is 0 in the x direction because no force is speeding it up. Therefore you can use the same equation to find initial velocity and final velocity, which are gonna be the same because we have 0 acceleration:
X=Vot+1/2at^2
3=Vi(1.75)+1/2(0)(1.75)^
Vi=1.7
1.7 is your answer
I have my work in the picture I really like to make charts to help keep everything organized if that helps you
Answer: 50%
Explanation: efficiency=power input/power output ×100
Eff.=300/600 ×100
Eff=½×100
Eff=50%
<h2>The ice melted is nearly 2.8 kg </h2>
Explanation:
The quantity of heat required to melt the ice can be found by the relation .
ΔQ = m x L
here L is used for the latent heat of fusion .
Its value is 334 J per gram for ice .
Thus m =
=
= 2836 gram
or = 2.8 kg approx
Answer:
The question is incomplete. Here is the complete question:
A Blu-ray disc is approximately 8 centimeters in diameter. The drive motor of the Blu-ray player is able to rotate up to 10,000 revolutions per minute, depending on what track is being read. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates. (b) Find the maximum linear speed (in meters per second) of a point on the outermost track as the disc rotates.
Answer:
(a) 1047.2 rad/sec
(b) 41.9 m/s
Explanation: Please see the attachments below
The probability he finds the trait in none of the dogs