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Serhud [2]
3 years ago
15

Amanda then used an inclined plane to push the same crate into the truck. She exerts a force of 77.5N a distance of 3.1m. What i

s the work done on the crate?
Physics
1 answer:
Kazeer [188]3 years ago
8 0

Answer: 240.25joules

Explanation:

Work is done when force is applied on an object over a distance. It is measured in joules.

Thus, Workdone = Force x distance

Since, Work = ? (unknown value)

Force = 77.5N

Distance = 3.1metres

Workdone = 77.5 N x 3.1metres

= 240.25 joules

Thus, Amanda did a work of 240.25joules on the crate

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On a hot summer day, a young girl swings on a rope above the local swimming hole. When she lets go of the rope her initial veloc
hodyreva [135]

Answer:

5.52 m

Explanation:

Using the equation;

Vy = Vo sin θ

    Where; Vo = 2.25 m/s and θ = 35°

We get;

       = 2.25 sin 35°

        = 1.29 m/s

Thus; Vy = 1.29 m/s

But a = -9.81 m/s (against gravity)

      t = 1.20 s and

y = Vyt + 1/2 at²

   where y is the height above the water

  = 1.29 × 1.2 + (1/2 × -9.81 × 1.2²)

  = 1.548 + (-7.0632)

   = - 5.5152 m

   Thus; the height of the girl above the water is 5.52 m

4 0
3 years ago
Where is the largest National Park?
Alina [70]
It is the Wrangell-St.Elias in Alaska.
It is 8,323,148 acres
It was established in December of 1980
7 0
4 years ago
How does energy relate to force?
ioda

Answer:work is force times distance

Explanation:to create a force u need energy and the greater the energy the greater the force is applied to an object.

4 0
3 years ago
Which change will always result in an increase in the gravitational force between two objects? increasing the masses of the obje
abruzzese [7]

By definition, we have that the gravitational force is given by:

F = \frac{G * m1 * m2}{r ^ 2}

Where,

G: gravitational constant

m1: mass of object number 1

m2: mass of object number 2

r: distance between both objects.

Therefore, for the gravitational force to increase, the following conditions must be met:

1) Increase the mass of the objects so that the numerator of the equation is greater.

2) Decrease the distance between the objects so that the denominator of the equation is smaller.

Answer:

A change that will always result in an increase in the gravitational force between two objects is:

increasing the masses of the objects and decreasing the distance between the objects

4 0
3 years ago
Read 2 more answers
Challenge Problem (Extra Credit) A car with bad shocks has a mass of 1500 kg. Before you go for a drive with three of your frien
Nastasia [14]

Answer:

167.354 m

Explanation:

We are given;

The mass of the car with bad shock;

m = 1500 kg

The distance at which the car sinks; x =

6 cm = 6 × 10^(−2) m

The total mass of 4 people; m_t = 11 kg

The total speed in the highway; V = 65

mph = 29.058 m/s

The spring's constant can be calculated from the formula;

F = Kx

F is also equal to mg.

Thus;

m_t × g = Kx

K = (m_t × g)/x

K = (11 × 9.81)/(6 × 10^(−2))

K = 1798.5 N/m

Mass of car and four people;m_(c+t) = 1500 + 11 = 1511 kg

Thus, the period cam be calculated from the formula;

T = 2π√((m_c+t)/k)

T = 2π√(1511/1798.5)

T = 5.759 s

the distance between adjacent bumps is calculated from;

Velocity = distance/time

Distance = velocity x time

Distance = 29.058 × 5.759

Distance = 167.354 m

4 0
4 years ago
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