Answer:
50J
Explanation:
Potential energy = mass (kg) * gravitational accelerations (10N on earth) * height
250 g in kg = 0.25
0.25 * 10 * 20 = 50 J
The heat developed can be calculated using the power rules as follows:
P = I x V = I^2 x R
First solution is to use the given values of I and R as follows:
P = I^2 x R = (2)^2 x 25 = 4 x 25 = 100 watt
Second solution is to use ohm's law to get V, then substitute to get the power as follows:
V = I x R = 2 x 25 = 50 volts
Power = V x I = 50 x 2 = 100 watt
Answer:
176.4 meters
Explanation:
The first equation is for average velocity. The other three are the constant acceleration equations you'll need to know.
v = at + v₀
v² = v₀² + 2a(x − x₀)
x = x₀ + v₀ t + ½ at²
x is the final position
x₀ is the initial position
v is the final velocity
v₀ is the initial velocity
t is time
a is acceleration
Notice that the first equation is independent of position.
The second equation is independent of time.
The third equation is independent of final velocity.
So knowing which information you <em>don't</em> have will point you to which equation you should use.
Let's begin:
"Which one would be best to find the distance the object fell from free-fall if it fell for six seconds, assuming if fell in the absence of air resistance and it still hasn't hit the ground? Solve this problem and show all steps of work."
We want to find the distance (change in position). We're given the time (t = 6 s) and we're given the acceleration (free fall without air resistance, so a = -9.8 m/s²).
We aren't given the final velocity, so the equation we should use is the third one:
y = y₀ + v₀ t + ½ at²
Unfortunately, we aren't told the initial velocity, but if we assume that the object starts at rest, then v₀ = 0 m/s. Substituting all values:
y = y₀ + (0 m/s) (6 s) + ½ (-9.8 m/s²) (6 s)²
y − y₀ = -176.4 m
The displacement is -176.4 m. Distance is the magnitude of displacement, so we can say the object fell 176.4 meters.
Is there supposed to be options with this or are those the options there, steeper and smaller
Just know this:
x + y < or equal to z
