3 years ago

Please can someone solve these questions with working out

Physics

2 answers:

Zolol [24]3 years ago

8 0

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Aleksandr-060686 [28]3 years ago

3 0

Answer:

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A uniform disk with a mass of 5.0 kg and diameter 30 cm rotates on a frictionless fixed axis through its center and perpendicula

igomit [66]

Answer:

Angular acceleration of the disk will be $\alpha =10.714rad/sec^2$

Explanation:

We have given mass of the disk m = 5 kg

Diameter of the disk d = 30 cm = 0.3 m

So radius $r=\frac{d}{2}=\frac{0.3}{2}=0.15m$

Moment of inertia of disk is given by $I=\frac{1}{2}mr^2=\frac{1}{2}\times 5\times 0.15^2=0.056kgm^2$

Force is given by F=4 N

Torque is given as $\tau =Fr=4\times 0.15=0.6N-m$

We also know that torque is given by $\tau =I\alpha$

$0.6=0.056\times \alpha$

$\alpha =10.714rad/sec^2$

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3 years ago

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Norma-Jean [14]

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A motor raises the car up the tower from point C to point A with a constant velocity. State Newton’s First Law of Motion and exp

GarryVolchara [31]

newton 1st law: w no external force, a body will stay at rest or in constant uniform motion.

a motor raises the car up the tower. cuz it moves w/ constant vel, there is no external force: the motor force is the same n in opposity direction as the gravity force on car.

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3 years ago

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Earth receives some of the Sun's energy in the form of heat and light.

musickatia [10]

Answer:

a) nuclear

Explanation:

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3 years ago

As you walk away from a plane mirror on a wall yiur image is always a real image no matter how far you are from the mirror?

Alexus [3.1K]

Answer:

Correct option is D.

Explanation:

The size may change due to the distance from the mirror

I am 100% Sure about this answer

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3 years ago

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Please can someone solve these questions with working out​

Please can someone solve these questions with working out