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bekas [8.4K]
3 years ago
13

A small 18 kilogram canoe is floating downriver at a speed of 1 m/s. What is the canoe's kinetic energy?

Physics
1 answer:
In-s [12.5K]3 years ago
8 0

Kinetic energy = (1/2) (mass) (speed²).

A Physicist in the canoe, or on a raft floating downriver next to the canoe, will say that the canoe's kinetic energy is zero.

A Physicist on the riverbank, watching the canoe drift by at 1 m/s, will say that its kinetic energy is 9 Joules.

They're both correct.

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Can someone answer questions 1-3 please.
Lunna [17]

Answer:

Question 1 is C.

thats all ik

Explanation:

4 0
3 years ago
In a city grid, each block on the east-west streets is 100 meters long. Each block on the north-south streets is 20 meters long.
alex41 [277]

Answer:

72.1 m

Explanation:

Hello!

When the walker walks west, each block he walks will be of 100 m, so the walker walked 4*100m = 400 m west.

Similarly, when the walker walks south, he walks 20 meters per block, therefore, the walker walked 4*20 m = 80 m south.

Since the directions west and south are perpendicular, the distance between the start ad end point is:

d = √(400^2 + 80^2) m = 407.92 m

However the walker traveled 480 m

Therefore, the walker traveled 480 - 407.9 m = 72.1 m farther than the actual distance

8 0
3 years ago
Adam wants to work in the field of forensic science and follow the rules for handling evidence. Which organization can he join t
Tamiku [17]
I would say its c . <span>National Academy of Forensic Science</span>
4 0
3 years ago
This diagram shows a stationary box sitting on the floor. Which statements about the other force exerted on the box are
Alex777 [14]

It's a normal force exerted by the floor. It balances the gravitational force. Option A is correct. The normal force is balanced by the gravitational force.

<h3>What is the friction force?</h3>

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N). Mathematically it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and accelertaion in the different components and balancing the equation gets components in the y-direction.

The normal force is balanced by the gravitational force. It's a normal force exerted by the floor. It balances the gravitational force.

Hence, option A is correct.

To learn more about the friction force refer to the link;

brainly.com/question/1714663

#SPJ1

5 0
2 years ago
6. Rank the following in terms of increasing kinetic energy:
bogdanovich [222]
I'm doing dis greatest to least

1.C
2.A
3.D
4.B
5 0
3 years ago
Read 2 more answers
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