A block slides on a table pulled by a string attached to a hanging weight. In case 1 the block slides without friction and in ca
2 answers:
Response:
In the second scenario
Clarification:
Reasoning:
Friction opposes motion.
In scenario one, the block glides without any friction present, indicating a smooth surface allowing minimal net force to pull the string.
In the second scenario, kinetic friction plays a role between the sliding block and the table, where kinetic friction is expressed as:
with relevant variables being as the coefficient of friction and N as the normal force.
This means the necessary net force becomes:
Thus, the force is greater in the second situation.
Consequently, the tension is also heightened in the second scenario.
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Answer:
Induced EMF is 2 x 10⁻³ volts
Explanation:
B = strength of the magnetic field aligning with the loop's axis = 1 T
= area change rate of the loop = 20 cm²/s = 20 x 10⁻⁴ m²
θ = the angle formed by the magnetic field and area vector = 0
E = the induced EMF across the loop
EMF can be calculated using the formula
E = B
E = (1) (20 x 10⁻⁴ )
E = 2 x 10⁻³ volts
E = 2 mV
At time , the ball's horizontal and vertical velocities can be represented as
However, since the ball is thrown horizontally, we have . The horizontal and vertical positions at time
are
The ball travels a distance of 22 m horizontally from the throw point, thus
With this, we determine that the time for the ball to reach the ground is
When it touches down, and