9. An object which is in circular motion (moving along a circle) is said to be accelerating because it changes it's direction constantly even if it is moving with a constant speed. cuz acceleration is change in either magnitude or direction of an object with respect to time.
therefore, it's still acceleration as change in direction with time.
10. Average speed of an object can be calculated by dividing the total distance covered by an object by time taken to cover that distance.
i.e
it can be re- arranged to find the distance as :
11. speed = 20 m/s : conversion into km/h
distance covered : 4 km = 4000 m
time taken = 200 seconds
12. let's use the first equation of motion to find the acceleration :
Answer:
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Explanation:
Answer:
p_{f} = 6 m / s
Explanation:
We can solve this exercise using conservation of momentum. For this we define a system formed by the two balls, so that the forces during the collision have been intense and the moment is preserved
Initial instant. Before the crash
p₀ = m v +0
Final moment. Right after the crash
= (m + m) v_{f}
how the moment is preserved
p₀ = p_{f}
m v = 2 m v_{f}
v_{f} = v / 2
we calculate
v_{f} = 12/2
p_{f} = 6 m / s
Answer:
P = 1401.4 x 10⁶ W
Explanation:
Given that
Water flow rate m = 2.2 x 10⁶ kg/s
Height ,h= 65 m
Acceleration due to gravity ,g= 9.8 m/s²
The power P is given as
P= m g h
P=Power
m=Water flow rate
h=height
Now by putting the values in the above equation
P = 2.2 x 10⁶ x 9.8 x 65 W
P = 1401.4 x 10⁶ W
Therefore the power wasted will be 1401.4 x 10⁶ W.
