B - electric currents
Look into Lorentz force law if it would be helpful
Answer:
b.. a difficulty of changing an object's motion, that's my ✨ g u e s s ✨
Answer:
Explanation:
The statistic shows the fastest roller coasters in the world in 2021, by top speed
Jane's mechanical energy at any time is
where
is the potential energy, while
is the kinetic energy.
Initially, Jane is on the ground, so the altitude is h=0 and the potential energy is zero: U=0. She's running with speed v, so she has kinetic energy only:
Then she grabs the vine, and when she reaches the maximum height h, her speed is zero: v=0, and so the kinetic energy becomes zero: K=0. So now her mechanical energy is just potential energy:
But E must be conserved, so the initial kinetic energy must be equal to the final potential energy:
from which we can find h, the maximum height Jane can reach:
Given :
A car slows down from -27.7 m/s to -10.9 m/s while undergoing a displacement of -105 m.
To Find :
The acceleration of the car.
Solution :
We know, by equation of motion :
Therefore, acceleration of the car is 3.088 m/s².