Answer:
t = 2 s
Explanation:
In order to find the time taken by the stone to fall from the top of the building to the ground we can use 2nd equation of motion. 2nd equation of motion is as follows:
s = Vit + (0.5)gt²
where,
t = time = ?
Vi = Initial Velocity = 20 m/s
s = height of building = 60 m
g = 9.8 m/s²
Therefore,
60 m = (20 m/s)t + (0.5)(9.8 m/s²)t²
4.9t² + 20t - 60 = 0
solving this quadratic equation we get:
t = -6.1 s (OR) t = 2 s
Since, the time cannot be negative in magnitude.
Therefore,
<u>t = 2 s</u>
Hello there,
Holding health care personal to lesser standards of care in emergencies is call the what statue?
Answer: A. Good Samaritan
Answer:
Downwards
Explanation:
Using Fleming's right hand rule, where the middle finger represents the negative charge moving in the south to north direction, the fore finger represents the magnetic field which points in the east to west direction.
If we are to follow this orientation and place the thumb, middle finger and fore-finger at right angles to each other, the thumb represents the direction of the magnetic force on the charge.
In this case, the magnetic force points downwards after setting the other orientations of the magnetic field and the negative charge's direction.
Answer:
4.5s
Explanation:
That must be the right answer.
Answer:
an example of an exthermic process is combustion
Explanation:
combustion is like lighting a candle
