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Lina20 [59]
3 years ago
10

You are standing on a scale in an elevator. suddenly you notice your weight decreases. what do you conclude? a. the elevator is

accelerating downwards. b. the elevator is accelerating upwards. c. the elevator is moving at a constant velocity upwards. d. your diet is working. e. the elevator is moving at a constant velocity downwards.
Physics
1 answer:
solong [7]3 years ago
3 0

Answer:

The elevator is accelerating downwards.

Explanation:

When an elevator accelerating downward it moves together with the person inside and the weight of the person does not change, but if the person is standing on a scale the contact force between the person and the scale is reduced.  The scale therefore has to push upward with less force on the person to support the person's weight. Therefore the Normal Force is smaller, so the reading on the scale becomes less than the true weight.

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Q4. A particle starting from rest, travels with a = 5 m/s2. What is the distance traveled in 10 sec?
anzhelika [568]

Answer:

250 m

Explanation:

Given :

Initial velocity, u = 0

Acceleration, a = 5 m/s2

Time elapsed is t = 10 seconds

The distance traveled in 10 seconds by the particle when accelerating at 5 m/s2 is given by,

$ x = ut+\frac{1}{2}at^2$

Putting the values,

$ x = 0\times 10+\frac{1}{2}(5)(10)^2$

$ x =\frac{1}{2}(5)(100)$

x = 250 m

The particle moved 250 m in 10 seconds

3 0
3 years ago
An object is moving with constant non-zero velocity on the +x axis. The position versus time graph of this object is
Anna11 [10]

Answer:

C

Explanation:

The Position Versus Time Graph Of This Object Is A Parabolic Curve.

6 0
3 years ago
A barge is carrying a load of gravel along a river.
sattari [20]

Answer:

Explanation:

Shoveling gravel into the water will increase the buoyancy of the barge, which will make it float higher. Without data it is hard to tell if it will raise the barge enough to be counterproductive, but in any case throwing away the payload is not a good idea. Adding some weights would make the barge float lower, and then maybe the plie can make it under the bridge.

7 0
3 years ago
If you had a 14 m long timeline, where would the extinction of the dinosaurs be?
Lapatulllka [165]

If you had a 14 m long timeline, the dinosaurs would be less than one meter from the end.

<h3>What is extinction of species?</h3>

The extinction of species or organisms is the process by which some environmental factors cause a decline in the number of species through death.

Dinosaurs are some of the examples of species that are in extinct.

Since dinosaurs are in extinction, If you had a 14 m long timeline, the dinosaurs would be less than one meter from the end.

Learn more about extinction here: brainly.com/question/1048615

#SPJ1

5 0
2 years ago
Look at picture and please help if i get one more wrong i can’t get to 80%
NemiM [27]
A, B and C are all correct. They can be made from igneous, sedimentary or other metamorphic rock. I hope I’m not too late to answering!
3 0
2 years ago
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