I think I see it now, I get confused if I don't break down all the units...
( 2.8011 kg x 4.73x10^7 J/kg ) / 1853.9625 seconds = 71464.24418 Watts
Thanks!
so to travel 32 miles = 51499m / 27.7778 m/s = 1853.9625 seconds
and 2.8011 kg x 4.73x10^7 J/kg x 1853.9625 s = 2.4563x10^11 Watts ?
Thanks for the help!
Thanks for the quick reply!
So do I just take: 2.8011 kg x 4.73x10^7 J/kg x 27.7778 m/s = 3.68x10^9 Watts ?
If that is correct, I don't really understand how to units work out. How do we go from kg*((kgm^2/s^2)/kg)*(m/s) to Watts which I think is (kgm^2/s^2)/s
Homework Statement
For the following calculations, assume a typical electric car will need to apply a constant forc of 165 N to maintain a typical highway speed of 100 km/hr (27.7778 m/s).
A: What power (watts) is needed to maintain this speed?
B: What energy (Joules) is needed to travel 100...
Thanks! That pointed me in the right direction and helped a few things click. I used: x = x0 + vt to get:
1.7786m/s * 3.5s = 6.2251m (displacement east)
then used:
Δv= a * Δt = 1.05m/s (wind velocity to the south)
magnitude of displacement = Δv * Δt = 1.05 m/s * 6.251s = 6.5363m...
Homework Statement
An unsuspecting bird is coasting along in an easterly direction at 4.00 mph when a strong wind from the north imparts a constant acceleration of 0.300 m/s2. If the acceleration from the wind lasts for 3.50 s, find the magnitude, r, and direction, θ, of the bird\'s...