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son4ous [18]
3 years ago
8

You attach a 1.70 kg block to a horizontal spring that is fixed at one end. You pull the block until the spring is stretched by

0.200 m and release it from rest. Assume the block slides on a horizontal surface with negligible friction. The block reaches a speed of zero again 0.200 s after release (for the first time after release). What is the maximum speed of the block (in m/s)
Physics
1 answer:
Usimov [2.4K]3 years ago
8 0

Answer:

maximum speed of the block is 3.14 m/s

Explanation:

given data

mass = 1.70 kg

stretch in the spring = 0.2 m

time take by block to come to zero  t = 0.2 s

solution

we know that Time period of oscillation (T) that is express as

T = 2t    ......................1

put here value

T = 2 (0.2)

T = 0.4 s

so here time period is express as

T = 2\pi \sqrt{\frac{m}{k}}     ................2

here k is spring constant of the spring so  put here value

0.4  =  2(\pi ) \sqrt{\frac{1.70}{k}}  

here k will be

k = 419.02 N/m

so we use here conservation of energy that is

Maximum kinetic energy = Maximum spring potential energy   ............3

(0.5) m v² = (0.5) k x²

here v is maximum speed block

so put here value and we get

(1.70) v² = (419.02) (0.2)²

v = 3.14 m/s

so maximum speed of the block is 3.14 m/s

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exis [7]

Answer:

P=mv

Momentum=mass*velocity

Mass=55kg

Velocity=?

Momentum=220kg.m/s

P=mv

v=p/m

v=220/30

v=7.33m/s

Explanation:

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3 years ago
M Q|C An electric heater is rated at 1.50×10³W, a toaster at 750 W , and an electric grill at 1.00×10³ W . The three appliances
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The circuit breaker will tripped. Details below

<h3>What is power? </h3>

This is defined as the rate in which energy is consumed. Electrical power is expressed mathematically as:

Power (P) = voltage (V) × current (I)

P = IV

<h3>How to determine the total power</h3>

The following data were obtained from the question:

  • Power of heater = 1.50×10³ W
  • Power of toaster = 750 W
  • Power of grill = 1×10³W
  • Total power = ?

Total power = power of heat + power of toaster + power of grill

Total power = 1.50×10³ + 750 + 1×10³

Total power = 3250 W

<h3>How to determine whether or not the circuit breaker will tripped</h3>

To determine if the circuit breaker will tripped or not, we shall determine the current used by the appliances. Detail below:

  • Total power (P) = 3250 W
  • Voltage (V)= 120 V
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P = IV

Divide both side by V

I = P / V

I = 3250 / 120

I = 27.08 A

Since the current used by the three appliances (i.e 27.08 A) is greater than the current the circuit breaker (i.e 25 A), can with stand,thus, the circuit breaker will tripped

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brainly.com/question/64224

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8 0
1 year ago
a racing car undergoes a uniform acceleration of 4.00m/s2. if the net force causing the acceleration is 3.00 times 10^3 N, what
yKpoI14uk [10]

Answer: 750Kg

Explanation:

Recall that force is the product of the mass M, of an object moving at a uniform acceleration.

i.e Force = Mass x Acceleration

In this case, Mass = ?

Force = 3.00 x 10^3 N = (3.00 x 1000N)

= 3000N

Uniform acceleration = 4.00m/s^2

Force = Mass x Acceleration

3000N = Mass x 4.00m/s^2

Mass = (3000N/4.00m/s^2)

Mass = 750Kg (The SI unit of mass is kilograms)

Thus, the mass of the car is 750Kg

4 0
3 years ago
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings
Hatshy [7]

Answer:0.316 rad/s

Explanation:

Given

mass of Person m=65 kg

velocity of person v=3.8 m/s

diameter of turntable d=6.5 m

moment of Inertia of the table I_0=1850 kg-m^2

Moment of inertia of Person I

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686.56\times 1.17=(686.56+1850)\times \omega _2

\omega _2=\frac{686.56}{2536.56}\times 1.17

\omega _2=0.316 rad/s

4 0
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