1)A person stands on a bathroom scale in a motionless elevator.When the elevator

Question

1)A person stands on a bathroom scale in a motionless elevator.When the elevator begins to move, the scale briefly reads only0.61 of the person's regular weight.Calculate the acceleration of the elevator, and find the directionof acceleration.
1 m/s2
2 notenough information to decide upwards    downwards
2)A net force of 255 N accelerates a bikeand rider at 2.15 m/s2. What isthe mass of the bike and rider together?
1 kg
3)What is the weight of a 74 kgastronaut in the following locations?

(a) Earth
1 N
(b) Moon (g = 1.7 m/s2)
2 N
(c) Mars (g = 3.7 m/s2)
3 N
(d) in outer space traveling with constant velocity
4 N

4)What force is needed to accelerate a child on a sled (totalmass = 60.0 kg) at 1.19 m/s2?
1 N
2 notenough information to decide upwards    downwards 2 notenough information to decide upwards    downwards 2 notenough information to decide upwards    downwards
2)A net force of 255 N accelerates a bikeand rider at 2.15 m/s2. What isthe mass of the bike and rider together?
1 kg
3)What is the weight of a 74 kgastronaut in the following locations?

(a) Earth
1 N
(b) Moon (g = 1.7 m/s2)
2 N
(c) Mars (g = 3.7 m/s2)
3 N
(d) in outer space traveling with constant velocity
4 N

4)What force is needed to accelerate a child on a sled (totalmass = 60.0 kg) at 1.19 m/s2?
1 N

Explanation / Answer

Apperent weight = 0.61 * actual weight

        M ( g-a) =0.61 Mg

          0.39 Mg =Ma

Accleration a = 0.39 g = 3.822 m / s ^ 2

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