Moving company uses a machine to raise a 900 Newton refrigerator to the second floor of a building machine consists of a single
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If we see the forces on the astronauts then there is only one force on each astronaut while they are in air.
This force is due to gravity of earth.
Now while the astronauts are in air and doing some activities then the net force on them is counterbalanced on them by centrifugal force.
so we can say the rate of fall of astronauts due to gravity is at same rate as the orbiting rate of the space shuttle.
this is given by
so all astronauts will experience the situation of free fall.
Answer:
Here's what I get
Explanation:
A. Distance between A and B.
h = -½gt²
The stones go faster the farther they fall.
Stone A has already reached 5 m when B is released.
When B reaches 5 m, A has dropped further and is falling even faster.
The distance between the stones increases with time.
Figure 1 shows this effect in a graph of height vs. time.
B. Speed of Stone B
v² = 2gh =2 × ( -9.81 m·s⁻²) × (-5 m) = 98.1 m·s⁻²
v = 9.9 m/s
The stone is travelling at 9.9 m/s when it reaches 5 m.
C. Velocity vs time
v = -gt
Both stones accelerate at the same rate.
When Stone B has reached 10 m at time t, Stone A is falling much faster.
Fig. 2 shows this in a graph of velocity vs time.
