The scientists describe them as D. Elliptical
Answer:
3300J
Explanation:
Work done is the energy that is lost by the skater
Formula for workdone = 1/2*mV^2
m = 66kg
V = 10m/s
Work done = 1/2 * 66 * 10^2
= 3300J
B.) 100 N is the CORRECT answer
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Answer:
Then final velocity of the coupled system of cars will be 0.58 m/s
Explanation: Let us consider the car-1 is moving towards right (say + ve direction) and car-2 is moving towards left (say in - ve direction), accordingly velocity are considered +ve and -ve.




Applying the conservation of momentum, and let the final velocity of combined system is V m/s


26250 - 9000 = 29500
V
V =
= 0.58 m/s
Then final velocity of the coupled system of cars will be 0.58 m/s
Answer:
Its vertical speed increases, and its horizontal speed remains the same.
Explanation:
Given that,
A baseball player throws a ball horizontally,
We know that,
A baseball player throws a ball horizontally, then vertical component of gravity will be increases but there is no acceleration in horizontal direction
So, horizontal velocity remains same.
Hence, Its vertical speed increases, and its horizontal speed remains the same.