3 years ago

The cube with 2.00m wide and 2.00m long and 2.00m high has a weight of 960.00 N what pressure does it exert

Physics

1 answer:

andre [41]3 years ago

3 0

2m X 2m = 4m ^2
960n / 4 = 240pa

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Answer:

225 m.

Explanation:

Applying the equation of motion.

v² = u²+2as..................... Equation 1

Where v = final velocity of the car, u = initial velocity of the car, a = acceleration of the car, s = distance traveled by the car.

make s the subject if the equation.

s = (v²-u²)/2a.................... Equation 2

Given: v = 0 m/s, u = 30 m/s, a = -2 m/s²

Substitute into equation 2

s = (0²-30²)/(-2×2)

s = -900/-4

s = 225 m.

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Complete Question

A loaded tractor-trailer with a total mass of 5000 kg traveling at 3.0 km/h hits a loading dock and comes to a stop in 0.64 s. What is the magnitude of the average force exerted on the truck by the dock

Answer:

The value is $F = 6508 \ N$

Explanation:

From the question we are told that

The total mass is $M_t = 5000 \ kg$

The time taken to come to a stop is $t = 0.64 \ s$

The initial velocity is $u = 3.0 km/h = 0.833 \ m/s$

Generally the magnitude of the average force exerted on the truck by the dock is mathematically represented as

$F = \frac{mu - mv}{t}$

Here v is the final velocity which is zero since the truck came to a stop

$F = \frac{5000* 0.833 - 5000 * 0}{0.64 }$

=> $F = 6508 \ N$

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