Answer:
Approximately along the slope, assuming that no energy was lost to friction.
Explanation:
Let denote the initial velocity of this vehicle. Let denote the mass of this vehicle. The kinetic energy (KE) of this vehicle would have initially been:
.
The gain in the gravitational potential energy (GPE) of this vehicle is proportional to the increase in its height.
Let denote the gravitational field strength. on the earth. If the increase in the height of this vehicle is , this vehicle would have gained GPE:
.
Hence, the height of this vehicle is maximal when the GPE of this vehicle is maximized.
Since the vehicle went out of fuel, all its GPE would have been converted from KE. Assuming that no energy was converted to friction. The GPE of this vehicle would be maximal when the entirety of the KE was converted to GPE.
Hence, the maximal GPE of this vehicle would be equal to its initial KE:
.
The maximum height of this vehicle would be:
.
Given that , the maximum height of this vehicle would be:
.
Refer to the diagram attached. The distance that this vehicle traveled along the slope would be approximately:
.
Answer: 16.8 m
Explanation:
The motion of the lemming is a projectile motion, consisting of two independent motions:
- on the horizontal (x) axis, a uniform motion, with constant speed v = 2.87 m/s
- on the vertical (y) axis, an accelerated motion, with constant acceleration (downward)
The lemming lands in the water at x = 5.32 m away from the bas of the cliff, so we can calculate the time it takes to hit the water:
And now, by considering the motion on the vertical direction:
we can find the height of the cliff (h) by requiring that y(t)=0:
D) 12 sodium, 4 phosphorus, 16 oxygen
sodium: 4Na3 -> 4 • 3 = 12
phosphorus: 4P - > 4
oxygen 4O4 -> 4 • 4 = 16
(the four is from the four in front of the whole formula)
Answer:
B. Both electric fields and forces ...
Explanation: