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stiv31 [10]
3 years ago
7

A bumper cart has a mass of 200 kg and has a protective bumper around it that behaves like a spring. The spring constant is 5000

n/m. If the cart is moving at a speed of 8 m/s towards a solid barrier, and upon impact, is momentarily brought to rest.
a) How much elastic potential energy will be stored in the spring when it is fully compressed?

b) What is the average force exerted by the spring if it is compressed by a distance of 0.2 meters?
Physics
1 answer:
34kurt3 years ago
4 0
Part A:
For this part we’re assuming all the kinetic energy of the moving bumper car is converted into elastic potential energy in the spring since the car is brought to rest. Therefore you can find the total kinetic energy to get your answer:

KE = ½ mv^2
KE = ½ (200)(8)^2
KE = 6400 J

Part B:
Now you can use Hooke’s law to find the force:

F = kx
F = (5000)(0.2)
F = 1000 N
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Explanation:
Refer to the figure shown below.

When a vehicle travels on a level road in a circular path of radius r, a centrifugal force, F, tends to make the vehicle skid away from the center of the circular path.
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At high speeds, the frictional force will not overcome the centrifugal force, and the vehicle will skid.

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5 0
3 years ago
A government agency estimated that air bags have saved over 14,000 lives as of April 2004 in the United States. (They also state
balu736 [363]

To solve this problem it is necessary to apply the concepts related to momentum, momentum and Force. Mathematically the Impulse can be described as

I = F*t

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F= Force

t= time

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Where,

m = mass

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From equilibrium the impulse is equal to the momentum, therefore

I = p

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PART A) Since the body ends at rest, we have the final speed is zero, so the momentum would be

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p = 75*0.15

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PART B) From the equation obtained previously we have that the Force would be:

Ft = m(v_1-v_2)

F(0.025)= 1125

F= 45000N

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6 0
3 years ago
A horse shoe magnet is placed on a mass balance such that a uniform magnetic field of magnitude B runs between it from North to
BARSIC [14]

Answer:

(a) Measured change in mass (Δm) = BVL/Rg

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Explanation:

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Fb = B*I*L -------------------2

Putting equation 1 into equation 2, we have;

Fb = B*V*L/R -------------------3

Change in mass (Δm) is given as:

Δm = Fb/g -----------------------4

Putting equation 3 into equation 4, we have;

Δm = BVL/Rg

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2. Since B runs from North to South and current running from East to West, then the magnetic force is directed upward.

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2 years ago
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NikAS [45]
<span>Gravitational force is affected by: a. mass c. distance b. weight d. both a and c

Mass.

</span>When an object is above the Earth's surface it hasgravitational potential<span> energy (GPE). The amount of GPE an object has depends on its mass and its height above the Earth's surface</span><span>


</span>
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