Answer:
using a stronger permanent magnet
increasing current in the electromagnet
decreasing the distance between the magnets
Explanation:
As we know the working of magnet is such that when current flows in the coil then due to strong magnetic field the coil will have tendency to rotate.
This is due to the torque on the coil which is given by
now if we need to make the motor to be more strong then we need more torque on it which will be increased by
B = due to stronger magnet or by placing the magnets more closer to each other
i = by increasing the current in the coil
Force of 500 N is acting on the parachutist.
Parachutist applies 500 N force in downward direction.
Answer:
300 N upward
Solution:
Parachutist feels air resistance of 800 N.
Thus, 800 N of force is acting in upward direction.
Total force acting on the parachutist is given by,
= air resistance force - force of parachutist
= 800-500
= 300 N
Direction of force is in upward direction because the air resistance force is more than force of parachutist.
In order to determine the acceleration of the block, use the following formula:
Moreover, remind that for an object attached to a spring the magnitude of the force acting over a mass is given by:
Then, you have:
by solving for a, you obtain:
In this case, you have:
k: spring constant = 100N/m
m: mass of the block = 200g = 0.2kg
x: distance related to the equilibrium position = 14cm - 12cm = 2cm = 0.02m
Replace the previous values of the parameters into the expression for a:
Hence, the acceleration of the block is 10 m/s^2