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4 years ago

Potential energy due to an objects compression or extension is called _______________________ energy.

Physics

1 answer:

cestrela7 [59]4 years ago

8 0

The answer to your question is B.

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A 4500 kg car accelerates from rest to 45.0

Llana [10]

The car undergoes an acceleration a such that

(45.0 km/h)² - 0² = 2 a (90 m)

90 m = 0.09 km, so

(45.0 km/h)² - 0² = 2 a (0.09 km)

Solve for a :

a = (45.0 km/h)² / (2 (0.09 km)) = 11,250 km/h²

Ignoring friction, the net force acting on the car points in the direction of its movement (it's also pulled down by gravity, but the ground pushes back up). Newton's second law then says that the net force F is equal to the mass m times the acceleration a, so that

F = (4500 kg) (11,250 km/h²)

Recall that Newtons (N) are measured as

1 N = 1 kg • m/s²

so we should convert everything accordingly:

11,250 km/h² = (11,250 km/h²) (1000 m/km) (1/3600 h/s)² ≈ 0.868 m/s²

Then the force is

F = (4500 kg) (0.868 m/s²) = 3906.25 N ≈ 3900 N

8 0

4 years ago

7. Find the speed of a 22 kg mass with a momentum of 450 kgm/s. (Round

jeyben [28]

Answer:

i don't know if this is right but here,9900 kgm/s

Explanation:

calculator UwU

6 0

4 years ago

A Hollywood stuntman is preparing for a dangerous car stunt. He must drive a car at high speed toward the edge of a cliff and br

Mnenie [13.5K]

Answer:

Maximum starting velocity that the car can possess if the stuntman is to be successful = 50 m/s

Explanation:

We have equation of motion , $s= ut+\frac{1}{2} at^2$ , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

In this case, displacement = 100 meter, acceleration = -8 $m/s^2$ , time = 10 seconds, we need to find initial velocity.

Substituting

$100= u*10-\frac{1}{2} *8*10^2\\ \\ u*10=100+400\\ \\ 10u=500\\ \\ u=50m/s$

So, Maximum starting velocity that the car can possess if the stuntman is to be successful = 50 m/s

5 0

3 years ago

Which expression is equivalent to 24^1/3 ?

uranmaximum [27]

The answer is going to be ∛24=(∛8)(∛3)=2∛3

3 0

4 years ago

A student is planning an investigation on the properties of different types of matter. What would be the best method to find the

BartSMP [9]

Explanation:

Volume is the amount of space an object takes up, while mass is the amount of matter in an object. ... To find the volume of an irregular sized object, one would use the displacement method for measuring volume and place the object in water and measure the amount of water that is displaced.

5 0

3 years ago

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