Answer:
Train will take 156 sec to travel 12km.
I believe the answer is A. shorter wires
Answer: True
Explanation:
Mass is the amount of matter in an object. Everything is made up of matter.
Plugging in for the Earth's mass and for G, we have 11.2 km/s for the escape velocity for an object launched from the Earth's surface. This is about 25,000 miles per hour
Answer:
Part a)

Part B)

Part c)

Explanation:
Part a)
As we know that

so we will have





Part B)
Angular speed of the yo-yo

so we have


Part c)
Tangential acceleration is given as


