3 years ago

Help me please asap :(

Physics

1 answer:

mixer [17]3 years ago

8 0

17. a
18. c
19. a
20. c
21. c

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Each statement below is a definition or an example of force, work, potential energy, or kinetic energy. Drag each into the box t

marshall27 [118]

Answer:

yes

Explanation:

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3 years ago

A car slows down uniformly from a speed of 22 m/s to rest in 4.0 seconds. How far did it travel in that time

krek1111 [17]

Answer:

$\boxed{\sf Distance \ travelled = 44 \ m}$

Given:

Initial speed (u) = 22 m/s

Final speed (v) = 0 m/s (Rest)

Time taken (t) = 4 seconds

To Find:

Distance travelled by car (s)

Explanation:

From equation of motion of object moving with uniform acceleration in straight line we have:

$\boxed{ \bold{s = (\frac{v + u}{2} )t}}$

By substituting value of v, u & t in the equation we get:

$\sf \implies s = ( \frac{0 + 22}{2} ) \times 4 \\ \\ \sf \implies s = \frac{22}{2} \times 4 \\ \\ \sf \implies s = 11 \times 4 \\ \\ \sf \implies s = 44 \: m$

$\therefore$

Distance travelled by car (s) = 44 m

4 0

4 years ago

430 in scientific notation would be _____.

Gre4nikov [31]

You move the decimal until it is in front of a number (not zero) 4.3 times 10^2

8 0

3 years ago

Read 2 more answers

Since the moon orbits the earth approximately every 27 days, there is a lunar eclipse approximately every 27 days.

Dahasolnce [82]

Answer:

No ! its False

Explanation:

We all know , we dont have lunar eclipse in every 27 days . They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.

5 0

3 years ago

Two carts on an air track have the same mass and speed and are traveling toward each other. If they collide and stick together,

lora16 [44]

Answer:

$p = 0$ , $K_{A} = m\cdot v^{2}$ (before collision), $K_{B} = 0$ (after collision).

Explanation:

The total momentum is obtained using the Principle of Momentum Conservation:

$m\cdot v_{A} - m \cdot v_{A} = 2\cdot v_{B}$

It is trivial to find that final speed and total momentum of the system are zero:

$p = 0$

The total kinetic energy of the system becomes zero due to the inellastic collision and the same masses and speeds. Total kinetic energies before and after collision are, respectively:

$K_{A} = m\cdot v^{2}$

$K_{B} = 0$

7 0

3 years ago