Answer:
137.8 N
Explanation:
First we need to find the acceleration of the sprinter. To do so, we can use the Torricelli's equation:
V^2 = Vo^2 + 2*a*S
9^2 = 2^2 + 2*a*25
81 = 4 + 50a
50a = 77
a = 77/50 = 1.54 m/s2
Now, to find the resulting force in the sprinter, we can use the following equation:
Force = mass * acceleration
Force = 70 * 1.54 = 107.8 N
If we have a 30 N force against the sprinter, the total force applied is:
Resulting force = Applied force - Wind force
107.8 = Applied force - 30
Applied force = 137.8 N
Answer:
28.2 kg
Explanation:
Data provided in the question:
Mass of dog, m = 9.4 kg
Velocity of the dog with respect to water, v = 0.48 m/s
Velocity of the canoe, V = - 0.16 m/s [ - sign means velocity in opposite direction]
Now,
Let the mass of canoe be 'M'
Therefore,
From the conservation of momentum, we have
⇒ mv + MV = 0
or
⇒ 9.4 × 0.48 + M(- 0.16) = 0
or
⇒ 4.512 - 0.16M = 0
or
⇒ 0.16M = 4.512
or
⇒ M = 28.2 kg
Answer:
the first popsicle was made because a kid accidentally left his fruit punch out in his front yard during winter
Explanation:
1) find speed (8.8 m/s)
2) find acceleration (38.7 m/s^2)
answer is about 38.7 m/s^2
Some guidance notes which may help.To calculate the current flow, Ohm's law can be used. This can be written as current=voltage/resistance, or I=V/R. V is 1.5V.R for the copper wire quoted would be calculated as R = resistivity x length/cross sectional area. The area would be calculated from the formula area = pi x diameter squared/4So, R=resistivity x length divided by (pi x diameter squared/4)Until is the resistivity of copper is known, that's about as far as can be gone.Any further questions, please ask.
