A) lighting an electric lamp as it becomes darker
K= fx => f = k/x => 50N/100cm / 10 cm = 5/10= 0.5 N
We use the kinematic equation for vertical motion,
Here, , and .
Therefore, the initial velocity when the object is at height 30 m, from above equation
Now the displacement before the reaching the height 30.0 m above the ground, we use kinematic equation
Here, , because freely falling object, released from rest and and we take height -h because downward falling.
Substituting these values in above equation, we get
.
Therefore, the total distance the object travels during the fall, s+h= 30 m+ 8.16 =38.16 m.
Answer:
225 kg.
Explanation:
Since the gravity is 2.5 times than that of the Earth, g on that planet = (10 * 2.5) m/s = 25 m/s.
Hence, the weight of the body would be (90 * 2.5) kg, aka 225 kg.
Hope this helped!
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