answer.
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
kumpel
10 days ago
12

A roundabout in a fairground requires an input power of 2.5 kW when operating at a constant angular velocity of 0.47 rad s–1 . (

a) Show that the frictional torque in the system is about 5 kN m. (3) 1. (b) When the power is switched off, the roundabout decelerates uniformly because the
Physics
1 answer:
ValentinkaMS [3.3K]10 days ago
5 0
Since the roundabout operates at a constant angular velocity, the input power equals the frictional power. Given that the frictional power is 2.5 kW, we can express this as frictional torque multiplied by angular velocity: frictional torque x 0.47 = 2.5 kW. Therefore, solving for frictional torque gives us 2.5 / 0.47 kN.m, which amounts to approximately 5.32 kN.m, leading to a rounded value of 5 kN.m. When the power supply is interrupted, the roundabout experiences deceleration due to the influence of the frictional torque.
You might be interested in
Is the electric potential energy of a particle with charge q the same at all points on an equipotential surface?
Sav [3045]
Indeed. This is the reason it's termed equipotential. 
8 0
1 month ago
If you start with the number 3.0 and move the decimal point one unit to the left, you wind up with 0.30. If you move the decimal
Keith_Richards [3146]

Answer:

10000    

Explanation:

When shifting the decimal point left, the number effectively gets divided by 10 for each movement.

Conversely, shifting it to the right corresponds to multiplying the number by 10 for every unit moved.

If the decimal point is moved four units to the left, it becomes 0.0003, which is equivalent to dividing 3.0 by 10000

\Rightarrow \frac{3.0}{10000} = 0.0003

4 0
23 days ago
A simple watermelon launcher is designed as a spring with a light platform for the watermelon. When an 8.00 kg watermelon is put
Yuliya22 [3221]
To tackle this problem, it's essential to employ concepts associated with force as per Hooke's law, alongside the forces described by Newton's second law and the concept of potential elastic energy. Since the forces are in equilibrium, the spring force matches the gravitational force. To find the spring constant k, we recognize the compression is 40cm at launch, hence applying the potential elastic energy formula results in determining the energy stored in the spring as 63.72 Joules.
6 0
21 day ago
A 1.0 kg brick falls off a ledge of height 44m and lands on the ground at 3.0 s later.
Keith_Richards [3146]
vf^2 = 2ad
vf^2 = 2(9.81)(44m)
vf^2 = 863.28
vf = √863.28
vf = 29.4  - using equations of motion

ME = PE + KE
ME = mgh + 1/2mv^2
ME = (1)(9.81)(44) + 1/2(1)(3^2)
ME = 431.64 + 4.5
ME = 436.14 - applying the principle of energy conservation

hope this helps:)
7 0
17 days ago
It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5°C to 95°C. If you
ValentinkaMS [3343]
You would gain an additional 40/60 of energy, which equals 2/3. To find the actual energy consumption, multiply 5/3 by the needed energy.
7 0
1 month ago
Other questions:
  • A ten-loop coil having an area of 0.23 m2 and a very large resistance is in a 0.047-T uniform magnetic field oriented so that th
    6·1 answer
  • A 248-g piece of copper is dropped into 390 mL of water at 22.6 °C. The final temperature of the water was measured as 39.9 °C.
    10·1 answer
  • In your own words, describe the three steps in ray tracing used to identify where an image forms.
    14·2 answers
  • An automobile engine takes in 4000 j of heat and performs 1100 j of mechanical work in each cycle. (a) calculate the engine's ef
    12·1 answer
  • Vinny is on a motorcycle at rest, 200 m away from a ramp that jumps over a gully. Calculate the minimum constant acceleration Vi
    9·1 answer
  • A 4.0-mF capacitor initially charged to 50 V and a 6.0-mF capacitor charged to 30 V are connected to each other with the positiv
    12·2 answers
  • The nardo ring is a circular test track for cars. it has a circumference of 12.5 km. cars travel around the track at a constant
    7·2 answers
  • a rectangular coil of 25 loops is suspended in a field of 0.20wb/m2.the plane of coil is parallel to the direction of the field
    7·1 answer
  • A glass beaker of unknown mass contains of water. The system absorbs of heat and the temperature rises as a result. What is the
    9·1 answer
  • Weddell seals make holes in sea ice so that they can swim down to forage on the ocean floor below. Measurements for one seal sho
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!