Answer:
Final velocity = 16 m/s
Total distane travelled = 390 m
Explanation:
We can use equation of motion to solve this:
Answer:
The mass of the box, m = 30.61 Kg
The acceleration of the box, a = 0.65 m/s²
Explanation:
Given that,
The weight of the box, w = 300 N
The sliding force acting on the box, F = 20
Since the weight of a body is equal to the product of mass and displacement. The mass of the box is given by the relation
m = w/g
Substituting the given values in the above equation
m = 300 / 9.8
= 30.81 Kg
Hence, the weight of the box is, w = 30.81 Kg
Since the sliding force acting on the box is 20 N
Therefore, acceleration
a = F / m
= 20 / 0.81
= 0.65 m/s²
Hence, the acceleration acting on the box, a = 0.65 m/s²
Answer:
(a) I = 0.6 A
(b) 22.5 * 10^19 electrons
Explanation:
Parameters given:
(a) Current is given as the time Tate of charge flow. Mathematically,
I = Q/t
Charge, Q = 3 C
Time, t = 5 secs
I = 3/5 = 0.6A
(b) The current flowing through the filament is 0.6A. In 1 min (60 secs), the charge will be:
Q = I*t
Q = 0.6 * 60 = 36 C
An electron has a charge, Qe, of 1.6022 * 10^(-19) C. Hence, the number of electrons will be:
N = Q/Qe
N = 36/(1.6022 * 10^(-19))
N = 22.5 * 10^19 electrons
To solve this problem we will apply the concepts related to the induced voltage or electromotive force. Said force is equivalent to the variation of the magnetic flux over time, and in turn, said flux could be expressed in terms of the cross-sectional area and the magnetic field. Under these relationships and our values we will find the finally desired value.
The induced emf is,
We have:
And
Then
Here,
r = The distance from the axis
R = Radius of the solenoid
Rearrange for
Replacing,
Answer:
1,170
Explanation:
Kinetic energy=1/2×m×velocity squared