Answer:
Explanation:
We would most likely write the velocity of the ball as follow :
V(b<em>all</em> with respect to t<em>rain)</em> = Vbt
Answer: 1. A Unbalanced force and net force
Explanation:
The combination of all forces acting on a object is called a Net Force, and a Unbalanced force can cause an object to stop, start moving or change direction.
Answer:
d = 369.38 km
Explanation:
The speed has a x-component and a y-component.
speed,x = 2.07cos(28.8°) = 1.81 km/s
speed,y = 2.07sin(28.8°) = 1.00 km/s
The time the shell flies is determined by the y-component, when it reaches the highest point the speed is 0 due to the gravitational acceleration.
0 = 1000 - 9.8 * t
9.8 * t = 1000
t = 102.04 s
After reaching the highest point the shell takes the same time to reach the ground where it was fired, so the total time it flies is 102.04* 2 = 204.08 s
Now you can calculate the distance it moves horizontally while it flies (constant speed)
d = 1.81 km/s * 204.08 s (I used the speed in km/s because the answer needs to be in km)
d = 369.38 km
Answer:
Explanation:
Total number of slices in the pizza = 16
Total number ate by John,
J = 7/12 * 16 = 28/3 = 9.3
Total number ate by Harold,
H = 4/23 * 16 = 2.783
Total number left over
L = 1/23 * 16 = 0.696
Total number ate by Betty
B = ?
All we have to do to get the total number eaten by Betty is to sum up that eaten by Harold and John, including the left over, then subtract it from the total pizza slices.
Betty = Total - (Harold + John + Left Over)
Betty = 16 - (9.3 + 2.783 + 0.696)
Betty = 16 - 12.779
Betty = 3.221
Therefore, Betty ate 3.221 of the total pizza as a whole