Answer:
D
Explanation:
The standard international (SI) unit for spring constant is N/m, so N/km is the same thing but bigger.
Answer:
A
Explanation:
as electromagnetic do they can obey wave property thus makes easy to study as due to reflection property makes easy study of shapes
Answer:
law of inertial
Explanation:
state that if anobject is in motion it will continue to move until some external force act on it.
Answer:
40 m/s.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 60 m/s
Height (h) = 100 m
Acceleration due to gravity (g) = 10 m/s²
Final velocity (v) =?
The velocity at height 100 m can be obtained as follow:
v² = u² – 2gh (since the ball is going against gravity)
v² = 60² – (2 × 10 × 100)
v² = 3600 – 2000
v² = 1600
Take the square root of both side
v = √1600
v = 40 m/s
Thus, velocity at height 100 m is 40 m/s
