Which of the following is NOT an example of accelerated motion?A. an airplane taking off down a straight runway
B. a boulder falling off a cliff in a straight path
C. a ball being thrown straight up
D. a bicyclist moving in a straight line at a constant speed

Answers

Answer 1

Answer: Accelerated motion = any change in speed or direction.

A. No. The airplane's speed is increasing.

B. No. The boulder's speed increases as it falls.

C. No. The speed of the ball decreases as it approaches the peak,
then it changes direction, begins to move downward, and its speed
increases steadily after that.

D. Yes. The cyclist's speed and direction are not changing.

Answer 2

Answer:

Final answer:

Accelerated motion refers to any motion with changing velocity, including changes in speed or direction. Most of the examples provided involve accelerated motion, except for the bicyclist moving in a straight line at a constant speed, as both speed and direction remain constant in such scenario.

Explanation:

In the context of physics, accelerated motion refers to any motion in which the velocity changes - either in magnitude (speed) or direction. This can be due to an increase or decrease in speed, or a change in direction. Examples of accelerated motion include an airplane taking off down a straight runway, a boulder falling off a cliff in a straight path, and a ball being thrown straight up.

However, a bicyclist moving in a straight line at a constant speed is NOT an example of accelerated motion. In this case, the speed (magnitude of velocity) and direction are both constant, and therefore there is no acceleration present.

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At about 55 meters/sec, a falling parachuter (before the parachute opens) no longer accelerates. Air friction opposes acceleration. Although the effect of air friction begins gradually, imagine that the parachuter is free
falling until terminal speed (the constant falling speed) is reached. How long would that take?

Answers

Well, it takes one second to get every 10 meters (if $g=10 m/s^2$ ), so one needs just 5.5 seconds. He would fall 137.5 meters (if my calculations are right) during that time.

Answer:

5.6 seconds

Explanation:

I did the worksheet and got it right

Which of the following terms describes the motion of particles during the transmission of wave energy?non-recurrent
arbitrary
periodic
unpredictable

Answers

The term that describes a wave energy from the choice is periodic. Wave energy occurs at intervals thus periodic. The main properties of a wave energy are the amplitude, wavelength, frequency and speed. Also, period is a property where it is defined as the time it takes for one complete wave to pass a certain point.

Answer:

periodic

Explanation:

A model rocket accelerates at 15.3 m/s2 with a force of 44 N.Calculate the mass of the rocket. Round your answer to the nearest tenth of a kg.

The mass of the rocket is
kg.

Answers

The mass of the rocket is 2.9 kg.

To calculate the mass of the rocket, you can use Newton's second law of motion, which relates force (F), mass (m), and acceleration (a) as F = ma. In this case, you have the force (44 N) and the acceleration (15.3 m/s²).

Rearrange the formula to solve for mass:

m = F / a

m = 44 N / 15.3 m/s² ≈ 2.9 kg

So, the mass of the rocket is approximately 2.9 kilograms. The mass is rounded to the nearest tenth of a kilogram as specified in the question. This mass represents the amount of matter in the rocket and is a critical factor in determining how the rocket accelerates when subjected to the given force.

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Answer:

2.9

Explanation:

In the equation you get 2.88 but you round that to the nearest tenth so you get 2.9

Personification means to give human characteristics to animals, ideas, and objects. a. True
b. False

Answers

True hope this helps :3

True! "The hurricane was angry." That is an example of personification.

How much will you pay for 5 pounds of shrimp if the cost is 2 pounds for $10.99?

Answers

10.99 = 2 pounds
10.99 / 2 = 5.495
5.495 x 5 = 27.475
= $27.48

I think that should be it

you are waiting in line to use the diving board at your local pool. While watching people dive into the pool from the board, you realize that using a diving board to spring into air before a dive is a good example of newtons third law of motion. Explain how a diving board illustrates newton's third law of motion?

Answers

Answer:

While we jump on the diving board then the force is applied by us in the downward direction on the diving board

due to this action force applied by us the diving board goes downwards while due to the reaction force of that diving board we will experience a force in opposite direction

that reaction force will be equal in the magnitude of the force applied by us on the diving board and it is opposite in the direction

so here we will move upwards and lift off the diving board

so this is a great example of newton's III law as per this law every action has equal and opposite reaction force

Well, because the diving board is helping the diver jump and helping increase the force of the diver's jump, they work together to help the jumper have a jump.

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What causes a bolt of lightning? A. Electrical charges build up in the clouds only.B. Electrical charges build up on the ground only.C. Electrical charges build up in the clouds and on the ground.D. Electrical charges build up in the space between the clouds and the ground.