Answer:
Work is defined as the amount of movement done by a force, and it can be calculated as:
W = f*d
where W is the work, f is the force and d is the distance.
So when the coach hits the ball, he is appliying some force in the ball (via the bat) that impulses the ball briefly (we can considerate that the force is only applied in a differential of time dt)
But we have a force applied and a displacement of the ball, so yes, the bat does work on the ball.
C, 5.3*10^3 kg m/s, is the correct answer to this question. Find the momentums of each object using p = mv, and then add the momentums together.
False<span>, well designed weight training programs actually target most of the muscles in the body. A good weight training program includes many compound exercises to activate multiple muscle groups and promote muscle hypertrophy. Some isolation exercises may also be included to target a specific muscle and help it grow.</span>
Hey there!
To solve this question, lets convert 108 km/h into meters per second.
1 km/h is equal to 0.277778 m/s
To convert 108 km/h into m/s, we just multiply 0.277778 by 108.
0.277778 × 108 = 30.000024
So, the train is travelling at approximately 30 meters per second.
Thank you!
ANSWER
R = 3 Ω
EXPLANATION
This is a circuit made of a power source and a resistor. To find the resistance on the resistor, we have to use Ohm's Law,
If we plot the measures in a current-voltage graph, the slope of that graph is the inverse of the resistance,
The slope of the line of best fit is approximately 1/3, which means that the resistance is 3 Ω.
If we apply Ohm's Law to get the resistance for each pair of measures (V, I), we should obtain a value around 3:
• For (6, 2):
• For (8, 2.7):
• For (10, 3.3):
• For (12, 4):
• For (14, 4.7):
Hence, the resistance is 3 Ω.