I'm doing questions in grade 10 math working on imperial system how should I give my answers in decimals or fraction it's an adult learning experience
Answer:
m = 20[kg]
Explanation:
This problem can be solved, using kinematic equations and then applying Newton's second law. First we must find the acceleration and then replace it in the equation of Newton's second law.
Initial data:
Vo = initial velocity = 0 [m/s]
t = 3[s]
T- F = -m*a
T - m*g = m*a
We can assume a value for tension T equal to 196 [N].
Note: For this problem it is important to assume a tension value, otherwise, it is impossible to determine the value of mass m, in Newton's second law equation.
Answer:
Explanation:Explanation: Newton's 2nd law states acceleration is proportional to the net force acting on an object. ... This means if friction is present, it counteracts and cancels some of the force causing the motion (if the object is being accelerated). That means a reduced net force and a smaller acceleration
Answer:
490.5 J
Explanation:
m = Mass of rock = 10 kg
g = Acceleration due to gravity = 9.81 m/s²
h = Height from the ground = 5 m
The potential energy gives the energy that the body posseses due to its mass and height of the fall.
Potential energy is given by
The potential energy of the rock which is at the given height is 490.5 J
Answer:
2.7 mV
Explanation:
A = 3.6 x 10^-3 m^2
B1 = 0.20 T, B2 = 1.4 T, t = 1.6 s
According to the Faraday's law of electromagnetic induction
e = - rate of change of magnetic flux
e = - dФ / dt
where, negative sign shows the direction of induced emf.
Ф = B x A
dФ / dt = A x dB / dt
e = A x dB / dt = 3.6 x 10^-3 x (1.4 - 0.2) / 1.6
e = 2.7 x 10^-3 V = 2.7 mV