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3 years ago

Wich of the following is NOT an example of accelerated motion?

2 answers:

7 0

The example that does Not show accelerated motion would be A. An elevator going up at constant speed, as in this example, the speed that the elevator is going up is not increasing or decreasing but is constant. A car taking a curve, although it may be at a constant speed, there is a change in direction associated with it, and thus the car is accelerating.

Allushta [10]3 years ago

5 0

B is the answer for your question the answer is b an elevator slowing down

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What are the correct units for force and for weight?

Ivahew [28]

Answer:

The associated SI unit of force and weight is the Newton, with 1 kilogram weighing 9.8 Newtons under standard conditions on the Earth's surface. However, in the US common units, the pound is the unit of force (and therefore weight). The pound is the widely used unit for commerce.

6 0

3 years ago

Read 2 more answers

The distance between two subway station is 3 miles if a train travels between the two stations at an average speed of 60 mph how

Andreyy89

Answer:

It takes 3 minutes.

Explanation:

The distance between the two subways is 3 miles.

The train travels at an average speed of 60mph (miles per hour).

$\frac{60miles}{1 hour} * \frac{1hour}{60minutes} = \frac{1mile}{1minute}$

We have to convert hours to minutes and we do that by cancelling out the hours and replacing it with minutes.

There are 60 minutes in an hour so we use that, 1 hour/60 minutes and multiply it to the existing speed we have.

The result is 1 mile per minute.

We then multiply the miles by 3 since that is how much we want and we get 3 minutes.

6 0

4 years ago

What two forces are there when you skydive

dusya [7]

Gravity is pulling you down and friction is slowing you down so you don't plummet to the ground at super high speeds.

7 0

4 years ago

Read 2 more answers

A pendulum consisting of a 0.5 kg mass tied to a 0.3 m string is set into oscillation at the same moment that a stone is dropped

lara31 [8.8K]

Answer:

2.72 cycles

Explanation:

First of all, let's find the time that the stone takes to reaches the ground. The stone moves by uniform accelerated motion with constant acceleration g=9.8 m/s^2, and it covers a distance of S=44.1 m, so the time taken is

$S=\frac{1}{2}at^2\\t=\sqrt{\frac{2S}{a}}=\sqrt{\frac{2(44.1m)}{9.8 m/s^2}}=3 s$

The period of the pendulum instead is given by:

$T=2 \pi \sqrt{\frac{L}{g}}=2 \pi \sqrt{\frac{0.3 m}{9.8 m/s^2}}=1.10 s$

Therefore, the number of oscillations that the pendulum goes through before the stone hits the ground is given by the time the stone takes to hit the ground divided by the period of the pendulum:

$N=\frac{t}{T}=\frac{3 s}{1.10 s}=2.72$

6 0

3 years ago

A stunt driver rounds a banked, circular curve. The driver rounds the curve at a high, constant speed, such that the car is just

bagirrra123 [75]

Answer: C

Frictional force

Explanation:

The description of the question above is an example of a circular motion.

For a car travelling in a curved path, the frictional force between the tyres and the road surface will provide the centripetal force.

Since the road is banked, and the cross section of the banked road is constructed like a ramp. The car drives transversely to the slope of the ramp, so that the wheels of one side of the car are lower than the wheels on the other side of the car, for cornering the banked road, the car will not rely only on the frictional force.

Therefore, the correct answer is option C - the frictional force.

5 0

4 years ago