The was launched into space by a rocket. The upward of the rocket shortly after
ID: 1422614 • Letter: T
Question
The was launched into space by a rocket. The upward of the rocket shortly after blast off is 80 m/s^2. When the rocket is accelerating. What is the weight of the that is what does the astronaut experience as the weight of his body? Show your calculations Your answer be in if the distance between the moon and the earth were doubled. What effect would this most have on the ocean tides? Why? Below are two pictures of someone supping a coin and letting it drop in a car moving at a speed of 30 km/h. The to picture is from the reference frame of the car. The picture in from the reference frame of the earth. The path followed by the dropped is different in each of reference. Answer the following questions to determine if law's of motion have been violated What force is acting on the dropped coin in the two frames of reference? Is the acceleration experienced by the dropped coin the same in both frames of reference? If not how does it differ? Is the initial speed of tExplanation / Answer
Q30.
Forces on the astronaut gravitational force mg, upward push of rocket F
F - mg = ma
a = 80 m/s2
appprent weight is m (g + a) = m (89.8) N
Q31.
If the distance between Earth and moon is doubled, tides will be smaller in magnitude, as moon's gravity will be less in magnitude
Q32
A Gravitational force is acting on the coin in both frames of reference.
B The acceleration experienced by coin in both frames is same. (acceleration due to gravity)
C. Initial speed is not the same in both frames of reference. In Car frame It is zero. In Earth frame Initial speed is same as car's speed (in horizontal direction). In Earth frame Initial speed is zero in vertical direction.
D. According to Newton's laws the path of coin should be a straight line in Car's frame. Initial speed is zero and acceleration is vertically downward.
E. According to Newton's laws the path of coin should be a parabola in Earth frame. Initial speed (30 km/h) is horizontal in direction and acceleration is vertically downward.
F. Our examples do not contradict the first postulate of Special theory of relativity. Both frames are Inertial and Newton's laws are valid
G From inside the car, we cannot tell whether the car is at rest or is moving with constant velocity.
H The same description will be valid for for a person at rest with coin moving horizontally and coin at rest and person moving with constant horizontal speed. so we cannot tell who is at rest.
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