ciaotaylor

19.10.2019 • 

Physics

Aunit that is equal to 33 000 ft-lbs/min or 550 ft-lbs/s is the

watts

kilograms

joules

horsepower

you are a nurse in a hospital. you are told to move a patient through three corridors each measuring 14.33 meters. because of friction it requires a constant force of 848 n to move the patient and wheelchair. how much work must you perform to accomplish this task?

a-34,512 n
b-6,221 n
c-973 n
d- 456.5 n
e- 36,456 n

if you managed to accomplish the task of wheeling your patient down the three hospital corridors in 5 minutes, what was your average velocity while doing so?

71.65 m/s

0.34 m/s

13.5 m/s

0.14 m/s

you buy a whirling toy helicopter for your little brother that is attached to a thin, flexible wire that the operator holds as the helicopter spins around the operator. if the length of the wire is 0.6 m and the tangential velocity of the toy helicopter is 0.57 m/s what is the helicopter's centripetal acceleration?

0.33 m/s^2

0.67 m/s^2

0.54 m/s^2

83.20 m/ft^2

30 mm/s^2

a cog on a gear spins around the gear's axis. if the gear's radius is 3.79 meters and it takes the cog 0.51 minutes to complete a full rotation, what is the cog's tangential speed?

46.67 m/min

34 m/sec

3.79 mi/min

1.25 m/sec

12 m/min

a cog or a cut tooth on a gear spins around the gear's axis. if the gear's radius is 3.79 meters, what distance does the cog travel around a gear's rotation?
3.79 m

12.9 m

34.12 m

1.25 m

23.8 m

how much power would be required to raise a 50 kg sack of flour from the floor to a table one meter high in 2 seconds? (g=9.81 m/s^2)

345 n*m
245 watts
981 watts
364 n*m
622 watts

Ответ:

susannaking5852

07.01.2022

Physics

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1.

Horsepower

Explanation:

As we know that "lb" is the unit of force

"ft" is the unit of distance

so here it is "ft-lb/ s" so it is product of force and distance and then divided by time

so it is work done per unit time which is power

so unit of power is given by Horsepower

2.

The work done is 36456 J

Explanation:

Length of each corridor = 14.33 m

total distance moved in three corridors = 3(14.33) = 42.99 m

Force applied = 848 N

So work done to move through the corridors is given as

3.

The velocity will be 0.14 m/s

Explanation

Average velocity is the ratio of total distance and total time.

Here total distance moved in three corridors will be

total time is given as

so average velocity will be

4.

Centripetal acceleration = 0.54 m/s^2

Explanation:

As we know that centripetal acceleration is given as

now we have

now we have

5.

The answer is 46.67 m/min

Explanation:

As we know that tangential speed is given by

here we have

now we have

6.

Distance traveled = 23.8 m

Explanation:

As we know that distance traveled in one complete revolution is given as

so distance traveled will be 23.8 m

7.

Power = 245 Watts

Explanation:

As we know that power is defined as rate of work done

so we will have

here we have

now we will put all the values in it

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Ответ:

nostalgiafaith

03.03.2022

Physics

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Mass is number 2. Vector is 5. Force is 3. Weight is 1. Net force is 6. magnitude is 4.

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