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
Nostrana [21]
3 years ago
10

How much power is used by car when it applies 40,000 J of work over a 5.6 second interval

Physics
1 answer:
Tcecarenko [31]3 years ago
8 0

Answer:

7142.86W

Explanation:

Given parameters:

Work done by brake  = 40000J

Time taken = 5.6s

Unknown:

Power used by car  = ?

Solution:

Power can be defined as the rate at which work is done. It is mathematically expressed as;

        Power = \frac{work done }{time taken}

Now input the variables;

           Power  = \frac{40000}{5.6}   = 7142.86W

You might be interested in
A box measures 4 m x 3 m x 2 m would it be easier to push the box if it were resting on a 3 m x 2 m side or on the 4 m x 3 m sid
ozzi

Answer:

465408754m468 iui m456m

4 0
3 years ago
Which of the following describes velocity only in terms of metric units?
Lelechka [254]

Choice 'D' describes speed in the metric units 'meter' and 'second'.
With no mention of direction, it can't be called 'velocity'.

8 0
4 years ago
Write about the similarities and differences between kinetic and potential energy. Include specific, real world example in your
lord [1]

Answer:

Energy is transformed from potential to kinetic and vice versa

Explanation:

The energy is transformed from mechanical to kinetic energy when the object changes its position with respect to a reference point, where it loses height but increases its speed. When the object is at maximum height with respect to a reference point, it will have its maximum potential energy value. When the object passes through the reference point it will have potential energy equal to zero, but this energy will become kinetic energy.

The most characteristic and real example is that of a pendulum at one end, as can be seen in the attached image.

When the pendulum is located at the top end, as shown in Figure 1, at that point the maximum potential energy will be held. Then the pendulum is released and when it passes through the reference point and its height is zero, with respect to that point, all potential energy will have become kinetic energy in the same way at this point the maximum speed of the pendulum will be set.

8 0
3 years ago
What are some important factors to consider when choosing a warm-up before your workout?
TEA [102]

<u>Answer:</u>

Prior to exercise, a proper warm-up of 10-15 minutes is extremely important to avoid injuries.

  1. Don't go too hard in the beginning and boost your activity level slowly. A good indication of a proper warm-up is that you feel sweat on your body parts.
  2. Don't overstretch right in the beginning as it can cause sore in your muscles and joints or stress fractures.
  3. Take a break if you feel sick or fatigues and use other drinks along with water to replace electrolytes and body fluids.  
6 0
4 years ago
Read 2 more answers
Scientists observe an approaching asteroid that is on a collision course with
nasty-shy [4]

Answer:

The approximate velocity the rocket must have to stop the asteroid completely after the collision is;

C. -324 m/s

Explanation:

The parameters of the asteroid and the rocket are;

The mass of the asteroid, m₁ = 11,000 kg

The initial velocity with which the asteroid is approaching Earth, v₁ = 50 m/s

The mass of the rocket, m₂ = 1700 kg

The initial velocity of the rocket = v₂

The final velocity of the combined asteroid and rocket after the collision, v₃ = 0 m/s

By the law of conservation of linear momentum, we have;

The total initial momentum = The total final momentum

m₁·v₁ + m₂·v₂ = (m₁ + m₂)·v₃

Substituting the known values, we get;

11,000 kg × 50 m/s + 1,700 kg × v₂ = (11,000 kg + 1,700 kg) × 0 m/s

11,000 kg × 50 m/s + 1,700 kg × v₂ = 0

∴ 1,700 kg × v₂ = -11,000 kg × 50 m/s

v₂ = (-11,000 kg × 50 m/s)/(1,700 kg) = -323.529412 m/s ≈ -324 m/s

The approximate initial velocity the jet must have to completely stop the asteroid after the collision is -324 m/s.

3 0
3 years ago
Other questions:
  • Which of these events indicate that a chemical reaction might have occurred?
    7·1 answer
  • A capacitor with the capacitance constant C has a charge of Q and a potential difference of V.
    6·1 answer
  • Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thr
    14·1 answer
  • The more particles that are hitting each other in a fluid, the less pressure is created. true of false
    14·1 answer
  • What type of circuit is it please give with explanation !!!!
    10·1 answer
  • Do action and reaction cancel each other out?
    11·1 answer
  • There are several forms of energy. Which of the following is not a form of energy?
    13·2 answers
  • Why is it important to listen to your body when playing sports
    12·2 answers
  • When a cyclist moves downhill without pedalling, what type of energy does he gain?
    12·2 answers
  • A watermelon is blown into three pieces by a large firecracker. Two pieces of equal mass m fly away perpendicular to one another
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!