Physics Practice Problems A water bottle is sitting on a table inside a spaceshi
ID: 2029793 • Letter: P
Question
Physics Practice Problems
A water bottle is sitting on a table inside a spaceship. Suddenly the bottle starts to slide toward the front of the spaceship. Which of the following statements describe the motion of the spaceship? The spaceship initially moving at a constant velocity in the forward direction and suddenly starts accelerating in the forward direction The spaceship initially moving at a constant velocity in the forward direction and suddenly starts accelerating in the backward direction The spaceship has entered a strong gravitational field 03) O 4) It could be any of the above situations Save Question 2 (1 point) A 24kg object is moving at a constant acceleration of 4.8m/s2. What is the net force on the object? O 1) 115.2N 2) 2352N O 3) 49.0N O 4) 2304.9NExplanation / Answer
Question(1)
OPTION ( 2)
the bottle slide toward the front because of inertia of direction.
the spaceship is moving with constant velocity .as the space ship
decelerates( backward direction) the bottle slide forward
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From newton's second Fnet = m*a
Fnet = 24*4.8 = 115.2 N <<<------------ANSWER
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for 3 kg mass
Fnet = m*a
f = 3*a
f is the force exerted between blocks
3 kg mass exerts force f on the 5 kg mass
for 5 kg mass
F - f = 5*a
F - 3a = 5a
F = 8a
acceleration a = F/8 = 64/8 = 8 m/s^2
f = 3*a = 3*8 = 24 N <<<------------ANSWER
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