Answer:
Hence, The effect of using split rings in a simple DC motor is that the direction of the current flowing in the coil is reversed.
Distance = speed x time. The total speed is 30 + 60 = 90km/h and the total time taken is 15 + 15 = 30 minutes. Therefore, you do 90 x 30 = 2700km
Answer = 2700km
Answer:Newton's 2nd law
Explanation:Newton's 2nd law also states that the rate at which an object changes speed is proportional to the force that is exerted. Engines provide thrust and accelerate a plane forward along the runway. If the engines supply a small force, only a small acceleration will result.
To solve this problem it is necessary to use the concepts of Force of a spring through Hooke's law, therefore,

Where,
k = Spring constant
x = Displacement
Initially our values are given,


PART A ) With this values we can calculate the spring constant rearranging the previous equation,



PART B) Since the constant is unique to the spring, we can now calculate the force through the new elongation (0.38cm), that is



Therefore the weight of another person is 265.79N.