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goblinko
3 months ago
13

A sports car can move 100.0 m in the first 4.5 s of constant acceleration.

Physics
2 answers:
Yuliya22 [3.3K]3 months ago
6 0
The acceleration of the car is 22.2 recurring meters per second squared

kicyunya [3.2K]3 months ago
4 0

Answer:

The car's acceleration is represented as a=9.87\ m/s^2

Explanation:

The initial speed of the car is u = 0

The distance the car travels is d = 100 m

Time elapsed, t = 4.5 s

Let a represent the car's acceleration, which can be found using the second equation of kinematics:

d=ut+\dfrac{1}{2}at^2

d=\dfrac{1}{2}at^2

a=\dfrac{2d}{t^2}

a=\dfrac{2\times 100}{(4.5)^2}

a=9.87\ m/s^2

Consequently, the car's acceleration is 9.87\ m/s^2. Thus, this provides the sought answer.

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3 months ago
Russ makes the diagram below to organize his notes about how Newton’s first law describes objects at equilibrium.
kicyunya [3294]
According to Newton's first law, an object remains at rest until an external force acts upon it, or an object in motion continues to move at a constant speed without accelerating.

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3 months ago
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A solid sphere is released from the top of a ramp that is at a height h1 = 2.30 m. It rolls down the ramp without slipping. The
Yuliya22 [3333]

Answer:

The horizontal distance d that the ball covers before it lands is 1.72 m.

Explanation:

Given,

Height of ramp h_{1}=2.30\ m

Height of bottom of ramp h_{2}=1.69\ m

Diameter = 0.17 m

We need to determine the horizontal distance d the ball travels before landing.

We need to calculate the time

Using the equation of motion

h_{2}=ut+\dfrac{1}{2}gt^2

t=\sqrt{\dfrac{2h_{2}}{g}}

t=\sqrt{\dfrac{2\times1.69}{9.8}}

t=0.587\ sec

Next, we can find the ball's velocity

Using the kinetic energy formula

K.E=\dfrac{1}{2}mv^2+\dfrac{1}{2}I\omega^2

K.E=\dfrac{1}{2}mv^2+\dfrac{1}{2}\times(\dfrac{2}{5}mr^2)\times(\dfrac{v}{r})^2

K.E=\dfrac{7}{10}mv^2

By applying the conservation of energy

K.E=mg(h_{1}-h_{2})

\dfrac{7}{10}mv^2=mg(h_{1}-h_{2})

v^2=\dfrac{10}{7}\times g(h_{1}-h_{2})

We substitute the values into the equation

v=\sqrt{\dfrac{10\times9.8\times(2.30-1.69)}{7}}

v=2.922\ m/s

Next, we determine the horizontal distance d the ball travels before landing

Using the distance formula

d =vt

Where. d = distance

t = time

v = velocity

We substitute the values into the formula

d=2.922\times 0.587

d=1.72\ m

Thus, the horizontal distance d that the ball travels before it lands is 1.72 m.

8 0
2 months ago
Read each scenario below. Then select the answer that best completes each sentence.
Ostrovityanka [3204]

Answer:

The power used by raul's microwave must match the power consumed by katrina's because both microwaves took different durations to accomplish the same heating task.

Explanation:

The power output from a car engine is equivalent to that of a bicycle since both perform the same amount of work over time. Both raul and katrina shared a frozen meal, heating each portion in different microwaves. Katrina's portion was warm in one minute, whereas raul's portion required two minutes. Therefore, the power utilized by raul's microwave aligns with that of katrina's, given that it took longer to achieve the same result.

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3 months ago
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