What is the direction of the frictional force?
Answer:
Direction of friction is always opposite to relative motion
Explanation:
Friction always resist the relative motion of two surface so it is always opposite to the direction of relative velocity
What is the direction of the normal force?
Answer:
It is perpendicular to the contact plane
Explanation:
Normal force is the perpendicular force which is always at 90 degree with the contact surface
How does the frictional force depend on the normal force?
Answer:
Explanation:
Friction force is directly proportional to the normal force so we can say it is given as
Let the x-axis be parallel to the incline and the y-axis rise from the incline at a right angle. By Newton's second law, if there is no acceleration in the y-direction (perpendicular to the plane), what must be the magnitude of the normal force?
Answer:
Explanation:
Normal force is equal to the component of the weight opposite to the direction of normal force
Use Newton's second law and the x-components of the forces to find the acceleration. m/s2
Answer:
Explanation:
As we know that
Answer:t
Explanation:
Given that,
Power output is
P = 0.50kW = 0.5 × 1000 = 500W.
We want to find energy transfer in
t = 2minutes = 2 × 60 = 120 seconds
Also, time to hour
t = 2/60 = 1/30 hour
Power is the rate of energy.
Therefore,
Power = energy / time taken
Energy = power × time taken
Energy = 0.5kW × 1/30 hr
Energy = 0.01667 kWh
Also, energy in Joule
Energy = power × time
Energy = 500W × 120s
Energy = 60,000J
Energy = 60kJ.
Answer:
10m/s^2
Explanation:
Given data
velocity= 40m/s
time= 4 seconds
Acceleration a =????
We know that
a= velocity/time
substitute
a=40/4
a= 10m/s^2
Hence the acceleration will be 10m/s^2
The current that would pass through the 30 ohms resistor is 2 A.
<h3>What is electric current?</h3>
Electric current is the rate of flow of electric charge round a conductor.
To calculate the electric current that would pass through the 30 ohms resistor, we use the formula below
Formula:
- I = V/Rt........... Equation 1
Where:
- I = Electric current passing through the 30 ohms resistor
- V = Voltage
- Rt = Total or effective resistance of the resistors.
From the question,
Given:
- V = 100 volts
- Rt = (30+20) ohms (since both resistors are connected in series)
Substitute these values into equation 1
Hence, The current that would pass through the 30 ohms resistor is 2 A.
Learn more about electric current here: brainly.com/question/1100341
