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3 years ago

7

two identical eggs are dropped from the same height. The first eggs lands on a dish and breaks, while the second lands on a pill

ow and does not break. Which quantities are the same in both situations

1 answer:

Nataly_w [17]3 years ago

5 0

Answer:

The height is the same

Explanation:

Because they were at the same height but they fell at different velocities

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A gardener pushes a shovel into the ground with a force of 75 N. The angle of the shovel to the ground is 80 degrees. What is th

jok3333 [9.3K]

Answer:

B

Explanation:

Resolve the 75N force into 2 components; horizontal and vertical. And remember that there is no acceleration in the downward direction, so apply Newton's second law and equate it to 0.

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3 years ago

Momentum has a _____.<br> a. direction only<br> b. magnitude only<br> c. direction and magnitude

weeeeeb [17]

Momentum has both direction and magnitude.

It is a vector quantity.

Its formula is = Mass * Velocity, Mass you know is associated with size and velocity of course is associated with direction.

C. direction and magnitude

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3 years ago

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A child is riding a merry-go-round that has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 ra

skelet666 [1.2K]

Answer:

So the acceleration of the child will be $8.05m/sec^2$

Explanation:

We have given angular speed of the child $\omega =1.25rad/sec$

Radius r = 4.65 m

Angular acceleration $\alpha =0.745rad/sec^2$

We know that linear velocity is given by $v=\omega r=1.25\times 4.65=5.815m/sec$

We know that radial acceleration is given by $a=\frac{v^2}{r}=\frac{5.815^2}{4.65}=7.2718m/sec^2$

Tangential acceleration is given by

$a_t=\alpha r=0.745\times 4.65=3.464m/sec^$

So total acceleration will be $a=\sqrt{7.2718^2+3.464^2}=8.05m/sec^2$

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3 years ago

Static discharge differs from electric current because static discharge is described by which of the following?

Bond [772]

<span>Static discharge differs from electric current because static discharge is described by C. lasting for only a fraction of a second.
This is a very short period of time, and electric current lasts longer than a static discharge does.
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4 years ago

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A 3 kg ball rolls at 2m/s does this system favor kinetic energy or potential energy?

MissTica

Answer:

Kinetic energy

Explanation:

Total energy of any system is always conserved.

$E = K +U$

E= Total energy

K = kinetic energy

U = Potential energy

Kinetic energy is the energy acquired by the system due to the virtue of it's motion.

Potential energy is the energy acquired by the system due to the virtue of it's configuration.

Also, Kinetic energy $K = \frac{1}{2} m v^{2}$

$K = \frac{1}{2} \times 3 \times 2^{2}$

$K = 6 J$

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3 years ago