Answer:
Speed = 72.76mph
Explanation:
east direction signifies +
Therefore,
1515E -1125(45) = -2640
F = -2640×0.75 = -1980lbs
so,
-1980lbs = Ma
but m = 2640×g where g = 32.2 ft/s²
so,
a = -(1980/2640g) = -0.75×g = -24.15ft/s² = dv/dt
0 = V-24.15t
V =24.15t
22.5 = Vt -12.07t²
22.5 = 24.15t² - 12.07t² = 12.07t²
t = 1.37 seconds
Therefore,
V = 24.15 × 1.37 seconds = 33.1 ft/s
converting to mph gives
33.1 ft/s = 22.6 mph
now back to momentum
1515 E -1125(45) = 2640 V
1515 E = 50625+59664
Speed = 72.76 mph
Answer:
Incomplete question, check attachment for completed question
Explanation:
The force of attraction between two forces are given as
F=kQq/r²
Answer:
a) 0.62 m/s
b) No
c) 0.27 joules
Explanation:
a) Total linear momentum (P) is the sum of the individual momenta of Cart 1 and Cart 2:
if it's zero
Momentum is the product of mass and velocity so:
because the direction of the Carts is opposite to each other, we should use a negative sing for one of the velocities (no matter which)
solving for
b) No, kinetic energy and linear momentum are different things, one of the most important differences is that kinetic energy is a scalar quantity and linear momentum is a vector quantity.
c)System kinetic energy is the sum of the individual kinetic energies
It's different of zero!
Scientists can tell this by looking at seismic waves released by earthquakes. ( if you need me to elaborate more ask)