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amid [387]
2 years ago
14

Một ô tô bắt đầu chuyển động thẳng nhanh dần đều,sau 10 giây đạt vận tốc 72km/h.Gia tốc của ô tô là

Physics
2 answers:
NeTakaya2 years ago
7 0

Answer:

van

Explanation:

7nadin3 [17]2 years ago
6 0

Answer:

1

Explanation:

1

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The propeller of a World War II fighter plane is 2.30 m in diameter. (a) What is its angular velocity in radians per second if i
Sergio [31]

Answer with Explanation:

We are given that

Diameter of fighter plane=2.3 m

Radius=r=\frac{d}{2}=\frac{2.3}{2}=1.15 m

a.We have to find the angular velocity in radians per second if it spins=1200 rev/min

Frequency=\frac{1200}{60}=20 Hz

1 minute=60 seconds

Angular velocity=\omega=2\pi f

Angular velocity=2\times \frac{22}{7}\times 20=125.7 rad/s

b.We have to find the linear speed of its tip at this  angular velocity if the plane is stationary on the tarmac.

v=r\omega=1.15\times 125.7=144.56 m/s

c.Centripetal acceleration=\omega^2 r=(125.7)^2(1.15)=18170.56 m/s^2

Centripetal acceleration==\frac{18170.56\times g}{9.81}=1852.25 g m/s^2

7 0
3 years ago
A circular loop carrying a current of 1.6 A is oriented in a magnetic field of 0.30 T. The loop has an area of 0.14 m 2 and is m
konstantin123 [22]

Answer:

The torque on the loop is 2.4 \times 10^{-2} Nm

Explanation:

Given:

Current I = 1.6 A

Magnetic field B = 0.30 T

Area of loop A = 0.14 m^{2}

Angle between magnetic field and area vector \theta = 21°

Form the formula of  torque in case of magnetic field,

 г = MB \sin \theta

Where M = magnetic moment

  M = IA

 г = IAB \sin 21

 г = 1.6 \times 0.30 \times 0.14 \times 0.3583

 г =2.4 \times 10^{-2} Nm

Therefore, the torque on the loop is 2.4 \times 10^{-2} Nm

7 0
3 years ago
Unbalanced contact forces between several object would result in ?
Svetlanka [38]
In a reaction with a directing vendor of the sum forces towards some object or nothing
3 0
3 years ago
Which occurs when a wave is reflected
Schach [20]
Reflection. It occurs when a wave bounces from the surface of an obstacle
3 0
3 years ago
Read 2 more answers
If a car is going faster will the reaction time alter? Explain your answer please
emmasim [6.3K]
Reaction time will stay the same for each person however the faster the car is going the faster someones reaction time would need to be react to something that happened.  therefore it might seem like someone had a slower reaction time when a car is moving faster because everything happens faster when you are moving faster

I hope I've helped!
4 0
3 years ago
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