When the force of air resistance equals the downward force of gravity, the net force on a falling object becomes zero, meaning it will fall at a constant speed.
The subject of this question is Physics, specifically focusing on the aspects of forces, gravity, and air resistance involved when an object is in free fall. When the magnitude of the upward air resistance equals the downward pull of gravity, the net force on the ball becomes zero. According to Newton's second law of motion, when the net force on an object is zero, its acceleration is also zero, meaning it will not speed up or slow down. In this case, the ball will fall at a constant speed. Therefore, the correct answer is b) fall at a constant speed.
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force of gravitation between two different masses is given by
here in first case we will have
Newton
another case we have
Newton
another case we have
Newton
so the force will be maximum in last case when two 2 kg mass is placed at 1 m distance and minimum force is in second case when 1kg and 2kg mass is placed at 2 m distance
A.
mitochondria
B.
vacuole
C.
Golgi body
D.
nucleus
ASAP
Power is defined in physics as the quantity of energy transported or transformed per unit of time. To calculate power, divide the amount of energy transferred by time.
Power is defined in physics as the quantity of energy transported or transformed per unit of time. The watt is the unit of power in the International System of Units, equivalent to one joule per second. Power is also referred to as activity in ancient writings. A scalar quantity is a power.
The formula for power is given as the ratio of energy transferred to the time taken.
Its SI unit is Watt, while the SI units for energy and time are seconds. Therefore, we can write,
Power = Energy transfer / Time taken
Joule = Watt / Second
Hence, To calculate power, divide the amount of energy transferred by time.
Learn more about Power here:
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b) How far will the bomb go over the ground (in the x direction) before it hits the target?
Answer:
(a) t = 4.52 sec
(b) X = 1,156.49 m
Explanation:
Horizontal Launching
If an object is launched horizontally, its initial speed is zero in the y-coordinate and the horizontal component of the velocity remains the same in time. The distance x is computed as.
(a)
The vertical component of the velocity starts from zero and gradually starts to increase due to the acceleration of gravity as follows
This means the vertical height is computed by
Where is the initial height. Our fighter bomber is 100 m high, so we can compute the time the bomb needs to reach the ground by solving the above equation for t knowing h=0
(b)
We now compute the horizontal distance knowing