Explanation:
power = Force × distance /time
power = 944N × 12.4m/36secs
power = (944×12.4/36)Nms—¹
power = 390.2Nms—¹ or 390.2Watts or 390.2Js—¹
Sure.
Can I use your answer to part-'a' ?
If the angular acceleration is actually 32 rev/min², than
after 1.2 min, it has reached the speed of
(32 rev/min²) x (1.2 min) = 38.4 rev/min .
Check:
If the initial speed is zero and the final speed is 38.4 rpm,
then the average speed during the acceleration period is
(1/2) (0 + 38.4) = 19.2 rpm average
At an average speed of 19.2 rpm for 1.2 min,
it covers
(19.2 rev/min) x (1.2 min) = 23.04 revs .
That's pretty close to the "23" in the question, so I think that
everything here is in order.
Answer:
See the answers below.
Explanation:
To solve this problem we must use the following equation of kinematics.
where:
y - yo = Fall distance [m]
Vo = initial velocity = 0 (dropped)
t = time = 6.5 [s]
g = gravity acceleration = 9.8 [m/s²]
Now replacing:
The question is related to the distance between the points where the ball was dropped and the ground.
The variables used are gravitational acceleration, time, fall distance, initial velocity.
Before the fuel is burned, it's chock full of chemical energy. When the fuel is burned, the chemical energy is released, and it escapes in the form of heat and light energy.
<u>Answer:</u>
<em>The truck is going 40 km/h faster than the speed limit.
</em>
<u>Explanation:</u>
The fixed speed limit = <em>60km/h</em>
distance travelled by the truck = <em>10 km</em>
time taken <em>t=6 minutes</em>
we have convert 6 minutes into hour
<em>1 hour=60 minutes
</em>
<em>1 minute=1/60 hour </em>
<em>6 minute=6/60 hour=1/10 h
</em>
Speed is obtained by dividing distance covered by time.
<em> speed = distance/time = =100 km/h
</em>
<em>difference between the speed of the car and the speed limit</em>
<em>=100-60 = 40km/h
</em>