Yes the winds are moving in a straight line
The amount of power required to move the 120 Kg person to a distance of 35 m in 150 s is 274.4 W
<h3>How to determin the power</h3>
Power is simply defined as the rate at which work is done. It can be expressed mathematically as
Power (P) = work (W) / time (t)
But
Work = force (F) × distance (d)
Therefore,
P = Fd / t
With the above formula, we can obtain the power as follow:
- Mass (m) = 120 Kg
- Distance (d) = 35 m
- Time (t) = 150 s
- Acceleration due to gravity (g) = 9.8 m/s²
- Force (F) = mg = 120 × 9.8 = 1176 N
- Power (P) = ?
P = Fd / t
P = (1176 × 35) / 150
P = 41160 / 150
P = 274.4 W
Thus, the power is 274.4 W
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In order to calculate velocity, we would need to know where the car was
when it started out, and where it was when it stopped. Without any of this
information, the best we can do is calculate its average speed.
Average speed = (distance covered) / (time to cover the distance)
= (50 miles) / (2.5 hours)
= (50 / 2.5) mile/hour
= 20 mile/hour .
Answer:
E = 1/2 M V^2 = 1/2 P V since P = M V
E2 / E1 = P2 V2 / (P1 V1)
P2 / P1 = E2 V1 / (E1 V2) = V2^2 V1 / (V1^2 V2) = V2 / V1
E2 / E1 = V2^2 / V1^2
V2 / V1 = (E2 / E1)^1/2
V2 / V1 = (.9)1/2 = .95
The linear momentum would have to decrease by 5%
Answer
19 m/s
Explanation
<u>Finding the velocity of the initial object</u>
Momentum=mass × velocity
P=m×v
4000=115 × v
v=4000/115 =34.78⇒35m/s
<u>Total momentum after the collision</u>
Because the momentum is conserved, the total momentum afterwards =4000kg-m/s
<u>Total mass after collision</u>
Total mass = mass of initial object + mass of second object
Total mass= 115+100= 215kg
<u>Finding new velocity after collision</u>
v=p/m
=4000/215
=18.60
=19m/s
