Answer:
h = 1.07 m
Explanation:
It is given that,
The average sped of the kingfisher, v = 4.6 m/s
Time, t = 1.4 s
Final speed, v = 0 (as it hits the water)
We need to find the height from which the bird dove. Let the height is h. According to the conservation of energy.
So, the bird dove from a height of 1.07 m.
Answer:
This is because , Repulsion takes place only between two likes poles of a magnet whereas attraction takes place between two unlike poles of a magnet and also between a magnet and a magnetic material . So , repulsion is the sure test of magnetism .
Explanation:
OOP :P
Explanation:
a. A grocery bag as you lift it up
b. A crane moving dirt......
d. A crate as you push it along the floor
Answer:
v = 1400 m/s
Explanation:
Acceleration of the rocket, a = -20 m/s²
Initial speed of the rocket, u = 1600 m/s
Time, t = 10 s
We need to find the final velocity of the rocket. We can use first equation of motion to find it.
v = u+at
Put all the values,
v = 1600+(-20) (10)
= 1600-200
= 1400 m/s
So, the final velocity of the rocket is 1400 m/s.
