Answer:
39.2m/s
Explanation:
Given parameters:
Mass of book = 5kg
Time taken for fall = 4s
Unknown:
Final velocity of the book = ?
Solution:
Serena dropped the book from rest therefore, the initial velocity of the book is 0.
Let us find the appropriate motion equation to solve this problem;
V = U + gt
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity = 9.8m/s²
t is the time taken
Insert the given parameters and solve;
V = 0 + 9.8 x 4 = 39.2m/s
Answer: 0.2N
Explanation:
mass of wagon = 100 grams
Convert mass in grams to kilograms
If 1000 grams = 1kg
100 grams = (100/1000) = 0.1kg
Acceleration of wagon = 2m/s/s
Force on the wagon = ?
Recall that Force is the product of mass of an object by the acceleration by which it moves.
i.e Force = mass x acceleration
Force = 0.1kg x 2m/s/s
Force = 0.2N
Thus, the force on the wagon is 0.2Newton
Answer:
Diodes helps in maintaining proper voltage levels
Explanation:
Electronic components such as diodes allow current to flow in forward biasing.
Under reverse biasing diode does not allow current to flow but a negligible amount of current does flow.
Forward biasing allow current to flow after crossing potential barrier .
When crossing this potential barrier we can observe an increase in current but the voltage does not go higher than . Even with the high input voltage.
Hence, diode maintains proper voltage in circuits.
Answer:
<h2><em>
0.165Tesla</em></h2>
Explanation:
The Force experienced by the wire in the uniform magnetic field is expressed as F = BILsin∝ where;
B is the magnetic field (in Tesla)
I is the current (in amperes)
L is the length of the wire (in meters)
∝ is the angle that the conductor makes with the magnetic field.
Given parameters
L = 0.56 m
I = 2.6A
F = 0.24N
∝ = 90°
Required
magnitude of the magnetic field (B)
Substituting the given values into the formula given above we will have;
F = BILsin∝
0.24 = B * 2.6 * 0.56 sin90°
0.24 = B * 2.6 * 0.56 (1)
0.24 = 1.456B
1.456B = 0.24
Dividing both sides by 1.456 will give;
1.456B/1.456 = 0.24/1.456
B ≈ 0.165Tesla
<em>Hence the magnitude of the magnetic field is approximately 0.165Tesla</em>