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Gemiola [76]
2 years ago
11

an object is moving east with a constant speed of 20m/s for 4 seconds.What is the object's acceleration

Physics
1 answer:
Tamiku [17]2 years ago
5 0

The objects acceleration is 6m/s.

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A race car accelerates at a constant rate from 20 m/s to 60 m/s in a time of 2 seconds. What is the car’s acceleration?
Vlada [557]

\huge\fbox{Answer ☘}

Given ,

initial velocity , u = 20 m/s

final velocity , v = 60 m/s

time taken = 2 seconds

Now ,

\bold{acceleration =  \frac{v - u}{t} } \\ \\   =  > \bold{ \frac{60 - 20}{2} }  \\ \\  =  >  \bold{\frac{40}{2} } \\  \\ \bold{ => 20 \: ms {}^{ - 2}}

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2 years ago
If a pulley with six supporting ropes is used to lift a 1200 lb piano, what input force is needed?
Lisa [10]

The correct answer is d) 200 lbs.

Hope that I was of help.

3 0
3 years ago
Read 2 more answers
In the figure, a weightlifter's barbell consists of two identical small but dense spherical weights, each of mass 50 kg. These w
kondaur [170]

The moment of inertia is 24.8 kg m^2

Explanation:

The total moment of inertia of the system is the sum of the moment of inertia of the rod + the moment of inertia of the two balls.

The moment of inertia of the rod about its centre is given by

I_r = \frac{1}{12}ML^2

where

M = 24 kg is the mass of the rod

L = 0.96 m is the length of the rod

Substituting,

I_r = \frac{1}{12}(24)(0.96)^2=1.84 kg m^2

The moment of inertia of one ball is given by

I_b = mr^2

where

m = 50 kg is the mass of the ball

r=\frac{L}{2}=\frac{0.96}{2}=0.48 m is the distance of each ball from the axis of rotation

So we have

I_b = (50)(0.48)^2=11.5 kg m^2

Therefore, the total moment of inertia of the system is

I=I_r + 2I_b = 1.84+ 2(11.5)=24.8 kg m^2

Learn more about inertia:

brainly.com/question/2286502

brainly.com/question/691705

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6 0
3 years ago
Simple physics (Final) (Pic provided)
Igoryamba

Answer:

15m/s

Explanation:

Divide distance by time

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3 years ago
Find the image position for a picture placed 3.0 cm outside the focal point of a converging lens with a 4.0 cm focal length. a.
horrorfan [7]
<span>Answer: Using 1/f = 1/d' + 1/d ...(where d' object distance and d is image distance) 1/4 = 1/7 + 1/d 1/4 - 1/7 = 1/d 3/28 = 1/d d = 28/3 d = 9.33 cm</span>
5 0
3 years ago
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