1. $85047
2. $113,080
3. $ 75,820
4. $41595
Newtons Law of motion
HOPE IT HELPS:)
Answer:
(a)
(b) h is the same
Explanation:
According to the law of conservation of energy:
The skier starts from rest, so 
and we choose the zero point of potential energy in the end of the ramp, so 
. We calculate the final speed, that is, the speed when the skier leaves the ramp:
Finally, we calculate the maximum height h above the end of the ramp:
The initial vertical speed is given by:
and the final speed is zero, solving for h:
(b) We can observe that the height reached does not depend on the mass of the skier
Answer:
yi = Initial height of the helicopter
yf = final height of the helicopter
vyi = component of the initial vertical velocity of the helicopter
g = gravity constant (9.8m/s^2)
yf = yi + vyideltat - 1/2gt^2
0m = 1000m + (15m/2)deltat - 1/2(9.8m/s^2)t^2
-1000m = (15m/s)t - (-4.9m/s^2)t^2
Use the quadratic formula
4.8t^2 - 15t - 1000 = 0
t1 = 15.75s and t2 = -12.65
t2 is rejected, time can't be negative
Thus, it takes 15.75s before the package strikes the ground.
The kinetic energy of the diver as she hits the water is 159.72J. Details about kinetic energy can be found below.
<h3>How to calculate kinetic energy?</h3>
The kinetic energy of a body can be calculated using the following formula:
K.E = ½ × m × v²
Where;
- K.E = kinetic energy
- m = mass
- v = velocity
According to this question, a 66.0 kg diver is 2.30 m above the water and falls at speed of 2.20 m/s.
Kinetic energy = ½ × 66 × 2.2²
K.E = 159.72J
Therefore, the kinetic energy of the diver as she hits the water is 159.72J.
Learn more about kinetic energy at: brainly.com/question/12669551
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