Answer:
0.304 m/s2
Explanation:
If the first child is pushing with a force of 69N to the right and the 2nd child is pushing with a force of 91N to the left. Then the net pushing force is 91 - 69 = 22 N to the left. Subtracted by 15N friction force then the system of interest is subjected to F = 7 N net force tot he left.
We can use Newton's 2nd law to calculate the net acceleration of the system
Answer:
i = 1.2 [amp].
Explanation:
In order to find the current in the circuit, we must perform a sum of voltages equal to zero, around the mesh.
∑V = 0
Let's take the direction of the current as shown in the drawing Clockwise.
Note: The negative sign means that the current moves in a counterclockwise direction.
Answer:
They create enormous amounts of sound energy, much like explosion. When an aircraft passes through air, it creates a series of pressure waves just like the waves created by the boat. As the speed of aircraft increases these waves are forced to compress.
Answer:
The runner's acceleration as she sped up to the finish line is 0.95m/s²
Explanation:
Acceleration is the change in velocity of a body with respect to time. It is expressed as;
Acceleration = change in velocity/time
Change in velocity = final velocity - initial velocity
Acceleration = final velocity - initial velocity / time
Given initial speed = 8.0m/s
Final speed = 9.9m/s
Time taken = 2.0s
Acceleration = 9.9-8.0 / 2.0
Acceleration = 1.9/2
Acceleration = 0.95m/s²
Answer:
E = –12V
Explanation:
Given
L= self inductance = 6.0H
di/dt = 2.0A/s
E = –L ×di/dt
= –6.0× 2.0
= –12V.