C
Because it shown me the same way that I was talking to her about her
Answer:
7.9
Explanation:
Take the fact that mass is inversely proportional to accelertation:
m ∝ a
Therefore m = a, but because we are finding the change in acceleration, we would set our problem up to look more like this:
Using algebra, we can rearrange our equation to find the final acceleration, :
Before plugging everything in, since you are being asked to find acceleration, you will want to convert 0.85g to m/s^2. To do this, multiply by g, which is equal to 9.8 m/s^2:
0.85g * 9.8 = 8.33
Plug everything in:
7.9 =
(1590kg the initial weight plus the weight of the added passenger)
Answer: Answer: The object moves forward at 5 m/s, stops, and then changes velocity.
Explanation:
With the information given in the question we can graph the points (image attached).
As we can observe, in the first segment of the graph the velocity is increasing linearly (at a constant rate) and is 5 m/s, then in the second segment we can see the position of the object remains the same from second 2 to second 4, which means the object is stopped.
Finally, in the third and last segment, we can observe a change in velocity (at a negative constant rate, because is decreasing), which is decreasing until the object stops.
Explanation:
Answer:
(a) The velocity is 12 m/s.
(b) The average force is 18 000N.
Explanation:
(a) The principle of conservation of momentum,
total momentum before = total momentum after
- = +
But, the initial velocities equal zero,
= = 0
So that,
0 = +
Substituting the values of variables given in the question,
0 = 1 × + 0.02 × 600
0 = + 12
= - 12 m/s
Thus, the velocity is 12 m/s.
(b) F = ma
From the third equation of motion,
= + 2as
a = -
=
= -900, 000 m/s^2
a = 900, 000 m/s^2
The acceleration is 900 Km/s^2.
F = 0.02 × 900000
= 18 000 N
Thus, the average force is 18 000N.