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2 years ago

HELP WILL GIVE BRAINLEST!!

Physics

1 answer:

andreyandreev [35.5K]2 years ago

8 0

Answer:

y hu

Explanation:

What are the 5 Stages of Child Development?

Newborn (0-3 months)

Infant (3-12 months)

Toddler (1-3 years)

Preschool age (3-4 years)

School age (4-5 years).

<h3>.Ages and Stages is a term used to outline significant periods in the human development timeline. During each stage, growth and development occur in the primary developmental domains, including physical, intellectual, language and social-emotional.</h3>

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A 300 kg car travels at 11 ms. What is the momentum

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3 years ago

A car's bumper is designed to withstand a 7.20 km/h (2.0 m/s) collision with an immovable object without damage to the body of t

ollegr [7]

Answer:

8512 N

Explanation:

From the work energy theorem we know that: The net work done on a particle equals the change in the particles kinetic energy:

$W=\Delta K=K_{f}-K_{i} \\
\\qquad \begin{array}{r}
W=F \cdot d, \Delta K=\frac{1}{2} m v_{f}^{2}-\frac{1}{2} m v_{i}^{2} \\
F \cdot d=\frac{1}{2} m v_{f}^{2}-\frac{1}{2} m v_{i}^{2}$

Where:

-W is the work done by the force.

- F is the force actin on the.

- d is the distance travelled.

- m is the mass of the car.

- $v_{f}, v_{i}$ are the final and the initial velocity of the car

$K_{f}, K_{i}$ are the final and the kinetic energy of the car.

Givens: $m=830 \mathrm{~kg}, v_{i}=2 \mathrm{~m} / \mathrm{s}, v_{f}=0 \mathrm{~km} / \mathrm{h}, d=0.195 \mathrm{~m}$

Plugging known information to get:

$F \cdot d &=\frac{1}{2} m v_{f}^{2}-\frac{1}{2} m v_{i}^{2} \\
F &=\frac{\frac{1}{2} m v_{f}^{2}-\frac{1}{2} m v_{i}^{2}}{d} \\
&=\frac{0-\frac{1}{2} \times 830 \times 2^{2}}{0.195} \\
&=8.512 \times 10^{3} \\
F &=8.512 \times 10^{3} \mathrm{~N}$

8 0

2 years ago