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3 years ago

A 20 kg truck drives in a circle of radius 4 m at 10m/s. What is the centripetal acceleration of the truck?

Physics

1 answer:

asambeis [7]3 years ago

4 0

Answer:

B. 25 m/s/s

Explanation:

Centripetal acceleration is the square of the tangential velocity divided by the radius of curvature.

a = v² / r

Given v = 10 m/s and r = 4 m:

a = (10 m/s)² / 4 m

a = 25 m/s²

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One particle has mass m and a second particle has mass 2m. The second particle is moving with speed v and the first with speed 2

choli [55]

Answer:

Explanation:

The formula for kinetic energy to be used here is 1/2mv².

If the first particle is "particle a" and the second particle is "particle n"; there kinetic energies (K.E) will be

K.Eₐ = 1/2.m2v² = mv²

K.Eₙ = 1/2.2mv² = mv²

From the above, it can be said that there kinetic energies are the same.

NOTE that the m and v used in the question means mass and velocity respectively.

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3 years ago

The pressure in a water line is 1500 kpa. what is the line pressure in (a) lb/ft2 units and (b) lbf/in2 (psi) units?

kotegsom [21]

To solve this problem, we know that:

1 psi = 6894.76 Pa

1 lb / ft^2 = 47.88 Pa

Therefore:

a. 1500 x 10^3 Pa * (1 lb / ft^2 / 47.88 Pa) = 31,328.32 lb / ft^2

b. 1500 x 10^3 Pa * (1 psi / 6894.76 Pa) = 217.56 psi

7 0

3 years ago

Read 2 more answers

Can track storms at different altitudes

OlgaM077 [116]

The radars, weather satellites and the several highly accurate barometers are used to track the different storms at different altitudes.

Further Explanation:

The storms at different altitudes are generated due to pressure variation in the different regions of the air. This pressure variation in the air is the main cause of the formation of the storms.

These storms can be easily tracked by means of the Radars and other weather forecasting satellites which keep a track of the variation in the trends of the pressure and temperature in the particular regions.

The trends of the strength of the winds can also predict a lot about the direction of motion of the winds. The highly accurate barometers are used to measure the strength of the storms originating at the different altitudes.

Thus, the radars, weather satellites and the several highly accurate barometers are used to track the different storms at different altitudes.

Learn More:

1. Forces of attraction limit the motion of particles most in brainly.com/question/947434

2. The amount of kinetic energy an object has depends on its brainly.com/question/137098

3. Which of the following are units for expressing rotational velocity, commonly denoted by brainly.com/question/2887706

Answer Details:

Grade: High School

Subject: Physics

Chapter: Pressure

Keywords:

Storms, weather forecast, satellite, barometer, radars, tracking a storm, different altitudes, pressure variations, temperature, winds, measure.

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4 years ago

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A child has fallen while riding a bike. When should a bystander call 911 ?

kari74 [83]

Answer:

C Or D

Explanation:

The Child Should Get Checked On Before You Call The Police Thought,

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3 years ago

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Which of the following statements best describes the definition of distance?

ch4aika [34]

Explanation:

The distance covered by a body is equal to the sum of total path covered. It is equal to the total path traveled by an object during its entire journey.

This quantity is always positive. It can't be 0 or a negative number.
It is defined as a scalar quantity.
Mathematically, it can be calculated as follows :

distance = speed × time

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3 years ago