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labwork [276]
4 years ago
11

A child pulls a wagon with a force F at an angle o with respect to the horizontal. Which of the following free body diagrams is

correct?

Physics
1 answer:
NeTakaya4 years ago
5 0

Option d) is the correct free body diagram.

Explanation:

A free-body diagram is a diagram that shows all the forces acting on a body. Each force is represented using an arrow, where:

- The length of the arrow is proportional to the magnitude of the force

- The direction of the arrow corresponds to the direction of the force

For the block in this problem, we have the following forces:

- The force F applied from the child, which acts at an angle with respect to the horizontal --> this rules out option a) and c), where the force acts horizontally

- The force of gravity (the weight of the object), labelled with W, which always acts downward --> this rules out option b), since the weight acts downward.

Therefore, the correct option is d).

(in reality, there should be another force: the normal reaction exerted by the floor on the block, N, acting upward).

Learn more about forces and weight:

brainly.com/question/8459017

brainly.com/question/11292757

brainly.com/question/12978926

#LearnwithBrainly

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A car has a speed of 2m/s and a mass of 1500 kg. what is the car's kinetic energy
larisa86 [58]
We have: K.E. = mv² / 2
Here, m = 1500 Kg
v = 2 m/s

Substitute their values in the formula, 
K.E. = 1500 ×2² / 2
K.E. = 6000 / 2
K.E. = 3000 J or 3 KJ

Finally, answer of your question would be 3000 Joule or 3 Kilojoule

Hope this helps!
4 0
3 years ago
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The velocity of a car increases from 10 km/h to 50 km/h in 5 seconds. What is its acceleration?
mr Goodwill [35]

Answer:

2.22m/s^2

Explanation:

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3 years ago
Discuss the path that light takes through the human eye
amm1812

The cornea is shaped like a dome and bends light to help the eye focus. Some of this light enters the eye through an opening called the pupil (PYOO-pul). The iris (the colored part of the eye) controls how much light the pupil lets in. Next, light passes through the lens (a clear inner part of the eye).

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2 years ago
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I lift a 20kg ball up 2.5 meters off the ground on Earth.
Umnica [9.8K]

Answer: How much gravitational potential energy does the ball have at this point? At h = 20.4 m the gravitational potential energy of the ball reaches maximum.  

How much work did I do lifting up the ball?  As you are lifting the object you are doing work on the object. The work W done on an object by a constant force is defined as W = F·d. It is equal to the magnitude of the force, multiplied by the distance the object moves in the direction of the force.

3 0
3 years ago
A baseball is thrown directly upward at time t= 0 and is caught again at time t=5s. Assume that air resistance is so small that
babymother [125]

Answer:

Explanation:

since the ball was thrown at 0s and caought again at 5 s. applying eqaution  of motion.

s = ut-\frac{1}{2}\times g \times t^{2}

0 = u×5 - \frac{1}{2}×10×5×5

solving the eqaution we gaet initial velocity u = 25 m/s.

there fore total energy E = \frac{1}{2}×m×25×25 J

where m is the mass of the ball according to conservation of energy E remains constant

conservation of energy:

kinetic + potential energy of the ball = E

kinetic energy = E - mgh                              \rightarrow    1

h = ut - \frac{1}{2}\times g\times t^{2}

applying ot in the eqaytion 1

kinetic energy = e - mg(25t - \frac{1}{2}\times g\times t^{2})         2

Therefore kinetic energy vs height will be a straight line with negative slope and kinetic energy vs time will be parabola that is open upward.

6 0
3 years ago
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