1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lubasha [3.4K]
3 years ago
14

Starting from rest, a 4.10-kg block slides 2.10 m down a rough 30.0° incline. The coefficient of kinetic friction between the bl

ock and the incline is (a) Determine the work done by the force of gravity. J(b) Determine the work done by the friction force between block and incline. J(c) Determine the work done by the normal force. J(d) Qualitatively, how would the answers change if a shorter ramp at a steeper angle were used to span the same vertical height
Physics
1 answer:
Tasya [4]3 years ago
4 0

Answer

mass of the block = 4.10 Kg

distance of slide = 2.1 m

angle of inclination = 30.0°

μ_k be equal to 0.436

a) Work done by the gravity

  W = \mu_k m g sin \theta \times d

  W =0.436 \times 4.1 \times 9.8 \times  sin 30^0 \times 2.1

  W =19.39\ J

b) Work done due to friction = \mu N L

                              =  -\mu m g cos \theta L

                              =  -0.436 \times 4.1 \times 9.8 \times cos 30^0 \times 2.1

                              = -31.86 J

c) work done by the normal force = 0 J

Since normal force and displacement are perpendicular to each other

d) for steeper angle

   sin θ value is high

   cos θ value is less

   work done by gravity on steeper angle is more

   work done by frictional force will on steeper angle is less

   work done by normal force is zero

You might be interested in
2. Lenses such as those in microscopes and telescopes depend on which property of<br><br> light?
Marizza181 [45]

Answer:

The eyepiece comprises a converging lens that is a magnifying lens. The lens has a short focal length,

This lens magnifies this image.

Explanation:

In lenses such as those in microscopes and telescopes, the objective forms an image with the following features:

1. Image is real

2. Image is diminished in size

3. Also, the image formed is upside-down.

The eyepiece comprises a converging lens that is a magnifying lens. The lens has a short focal length,

This lens magnifies this image.

5 0
3 years ago
A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
Anettt [7]
The sodium atom, Na, contains 11 protons, 11 electrons, and 13 neutrons.
6 0
3 years ago
A temperature of a 50 kg block increases by 15°C when 337,500 J thermal energy are added to the block. what is the block made of
DENIUS [597]

Answer:

Iron

Explanation:

H = mc∅

Above equation can be used here to find the answer to the question. this equation gives us the relationship between the heat energy supplied to a material and the temperature difference that the material would go through according to its mass.

here H is the Heat energy supplied to the material. m is the mass of the material. c is the specific heat capacity of the material and ∅ is the temperature difference applied to the material. we are given that H= 337,500J , m = 50 kg and ∅ = 15 °C. so from the equation now we can calculate the value of c. after calculating c we can find the material because c is an unique value for a particular material. no two materials have the same c value.

c = 337500/(50*15)

c = 450 J/(kg°C) - Iron (google the heat capacity value to find the answer Iron)

8 0
3 years ago
positively charged ebonite rod is brought close to a small ball. The rod does not touch the ball, which is made from a conductin
xxMikexx [17]

Answer:

The rod attracts the ball

Explanation:

5 0
3 years ago
The formula shown below is used to calculate the energy released when a specific quantity of fuel is burned. Calculate the energ
mafiozo [28]

Answer: 8400 J

Explanation:

The formula referenced in the question is:

Q=m. c. \Delta T  

Where:

Q  is the thermal energy

m=100g \frac{1 kg}{1000 g}=0.1 kg is the mass  of the water sample

c=4200 \frac{J}{kg\°C}  is the specific heat capacity of  water

\Delta T=20\°C  is the variation in temperature

Solving:

Q=(0.1 kg)(4200 \frac{J}{kg\°C})(20\°C)  

Q=8400 J  This is the thermal energy released

5 0
3 years ago
Other questions:
  • Astronaut A can cover 10 meters per minute walking with the heavy shovel. What does
    9·1 answer
  • Similarities in tennis and volleyball
    13·1 answer
  • How does acceleration affect speed and velocity
    11·1 answer
  • Who was the carthaginian general who used elephants to cross the alps in the second punic war
    10·2 answers
  • A physics student throws a softball straight up into the air. The ball was in the air for a total of 3.56 s before it was caught
    12·1 answer
  • Air enters the compressor of an ideal air-standard Braytoncycle at 100 kPa, 300 K, with a volumetric flow rate of 5 m3/s.The tur
    11·2 answers
  • Describe the conditions which will cause a rock fracture!<br> Plz hurry
    14·1 answer
  • When light passes through a convex lens, it does this.....
    7·2 answers
  • calculate the efficiency of a light bulb that had an input of 400 j transfers 100j as a light and 300j as heat.​
    5·1 answer
  • 1 ) when a ball is projected upwords its time of rising is ...............the time of falling .
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!