Answer:
Explanation:
The range of a projectile is given by the formula
where in this case, we have
d = 100 m is the range
u is the initial speed (the magnitude of the initial velocity)
g = 9.8 m/s^2 is the acceleration of gravity
is the angle of projection
Solving for u, we find:
Now we can easily find the components of the initial velocity:
So, the initial velocity of the ball is
where i and j are the unit vector indicating the horizontal and vertical direction.
Answer:
Explanation:
Given
mass of climber
Distance between rock and cliff=48.6 m
mass of rock
let T be the tension in the rope
Thus ------1
where a is the acceleration of system
Also for Rock
------2
From 1 & 2 we can say that
g+a=19.303 a
g=18.303 a
Thus climber is decelerating with
time to cover 48.6 m
t=13.47 s
No, people are not. A contract is, but people are not.
The correct answer is: (A) An Atmosphere
Explanation:
The atmosphere of Venus is almost ninety times denser than that of Earth. Due to Venus' denser atmosphere and chemical composition (as its atmosphere comprises of over 96% of Carbon dioxide), it experience an immense greenhouse effect. That is why its surface temperature remains higher than 470°. At that very high temperature, it is impossible to have life on the surface of Venus.
Answer:
a
Explanation:
3000 m / 4 minutes = 720 ave speed per minute
720 / 60 seconds = 12.5 m/s