A magnetic field is made by electric currents that is induced from opposite terminals of charges. When a current-carrying conductor is placed in a magnetic field, the electrons move to a certain direction. The guide used for this is Fleming's Left-Hand Rule as shown in the picture. It shows that the motion of the electron is in right angles or perpendicular to the force of the magnetic field. The resulting path of the direction of the electron will be in circular motion.This is the concept used in transformers where a voltage is induced from coils of currents. The electrons move in a helical or circular motion.
From information given, there are two forces in action, the vertical and the horizontal. We first need to calculate separately work done by these two forces, then determine the efficiency.
Work = Force × distance
work(a) → 600N × 2m = 1,200 Nm
work(b) → 300N × 5m = 1,500 Nm
Efficiency = work(a) / work (b) × 100
Efficiency = 1200 / 1500 × 100
Efficiency = 0.8 × 100
Efficiency = 80%
Therefore the efficiency of the ramp is 80%
We know that the mass of the log before burning is 5 kg.
After it is burnt, the mass of the ash comes out to be 1 kg. So there is a
definite mismatch of 4 kg. When the log is burnt, there is the formation of
smoke. The air and water present in the wood vaporises to reduce the weight
significantly. The combustion actually leads to the formation of carbon dioxide
that mixes with the air and also water. The extra mass thus goes into the
formation of carbon dioxide and water.
Answer:u=-22 m/s
Explanation:
Given
mass of puck 
Average force 
time of contact 
puck leaves with a velocity of 
We know impulse is 
therefore
Final momentum 
Impulse on the ball 
Impulse
Initial velocity is given by
i.e. initially ball is moving towards -x-axis
I don't see an image. Sorry I couldn't help you
