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
Illusion [34]
3 years ago
10

Questions from chapter 8.rotational of a rigid body

Physics
1 answer:
LUCKY_DIMON [66]3 years ago
7 0

the moment of inertia of wheel= 1/2mr²

m= mass of wheel= 2.8 kg

r= radius

i= 1/2 (2.8)(0.35)²=0.1715 kgm²

(a) torque = F r

F= force=5 N

r= radius=0.35 m

τ= 5 (0.35)

τ= 1.75 Nm

(b) for angular acceleration, we use

τ= iα

τ= torque= 1.75 Nm

i= moment of inertia=0.1715 kgm²

so 1.75 =0.1715 α

α=10.2 rad/s²

(c) for angular displacement θ, we use the kinematic equation,

θ= ωo t + 1/2α t²

ωo= initial angular velocity=0

t= time=4 s

α= angular acceleration=10.2 rad/s²

so θ = 0 (4) + 1/2 (10.2)(4)²

θ=81.6 rad

You might be interested in
By what means can the internal energy of a closed system increase?.
kirill115 [55]

Answer:

when work is done on the system or heat comes into the system

7 0
2 years ago
Read 2 more answers
What is he total resistance?<br> A. 20 ohms<br> B. 90 ohms<br> C. 40 ohms<br> D. 30 ohms
ehidna [41]
Imma guess A! Idk if it’s 100% correct tho so I’d check that!
6 0
3 years ago
Read 2 more answers
Please help me with this question
ladessa [460]

Answer:

conduction

Explanation:

5 0
3 years ago
Read 2 more answers
One of the signs a chemical reaction is taking place
ladessa [460]

Answer:  One of the signs a chemical reaction is taking place is the presence of bubbles. :)

6 0
3 years ago
7. Imagine you are pushing a 15 kg cart full of 25 kg of bottled water up a 10o ramp. If the coefficient of friction is 0.02, wh
pentagon [3]

Answer:

The frictional force needed to overcome the cart is 4.83N

Explanation:

The frictional force can be obtained using the following formula:

F= \mu R

where \mu is the coefficient of friction = 0.02

R = Normal reaction of the load = mgcos\theta = 25 \times 9.81 \times cos 10 = 241.52N

Now that we have the necessary parameters that we can place into the equation, we can now go ahead and make our substitutions, to get the value of F.

F=0.02 \times 241.52N

F = 4.83 N

Hence, the frictional force needed to overcome the cart is 4.83N

4 0
3 years ago
Other questions:
  • When iron is exposed to oxygen it rusts or oxidizes. Which of these represents the balanced equation for this chemical change?
    10·2 answers
  • Find the potential energy of a 2kg ball 15m in the air
    9·1 answer
  • Which nutrient is the first (easiest) to be broken down and absorbed for energy use in the body? Water Carbohydrates Fats Protei
    8·1 answer
  • A large ebony wood log, totally submerged, is rapidly floating down a flooded river. If the mass of the log is 165 kg, what is t
    9·1 answer
  • What is the charge on a hypothetical ion with 35 protons and 33 electrons?
    11·1 answer
  • In a lab, the mass of object a is 52 kg. object a weighs
    8·2 answers
  • Use the picture to answer the question.
    6·2 answers
  • It is a cold night around the campfire. Megan is trying to get warm by sitting close to the fire and clutching her mug of hot ch
    11·1 answer
  • Moving along the elevtromagnetic spectrum from low frequency to high frequency, what , if anything, happens to the wavelength?
    12·1 answer
  • Based on the tug of war pictured below, what is the net force? –190 n 10 n –10 n 190 n
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!