A ball is thrown with a velocity of 10 m/s at a 25º from the horizontal. How far does the ball travel?

If you are looking for a substance that will easily dissolve in water, you should look for a substance with which properties?

olga nikolaevna [1]

If you are looking for a substance that will easily dissolve in water, you should look for a substance with which properties? it is b. high solubility

5 0

3 years ago

II Force on a tennis ball. The record speed for a tennis ball that is served is 73.14 m/s. During a serve, the ball typically st

AveGali [126]

Answer:

F=248.5W N

Explanation:

Newton's 2nd Law tells us that F=ma. We will use their averages always. The average acceleration the tennis ball experimented is, by definition:

$a=\frac{\Delta x}{\Delta t}=\frac{v-v_0}{t-t_0}$

Since we start counting at 0s and the ball departs from rest, this is just $a=\frac{v}{t}$

So we can write:

$F=ma=\frac{mv}{t}=\frac{gmv}{gt}$

Where in the last step we have just multiplied and divided by g, the acceleration of gravity. This allows us to introduce the weight of the ball W since W=gm, so we have:

$F=\frac{Wv}{gt}=\frac{v}{gt}W$

Substituting our values:

$F=\frac{(73.14m/s)}{(9.81m/s^2)(30\times10^{-3}s)}W=248.5W N$

Where the average force exerted has been written it terms of the tennis ball's weight W.

8 0

3 years ago

How would be the number 54 be correctly produced in ASL

n200080 [17]

You put your 5 fingers up then you put 4 fingers up on the same hand

3 0

3 years ago

Read 2 more answers

Two people are pulling a boat through the water. Each exerts a force of 600 N directed at a 30.0 angle relative to the forward m

VashaNatasha [74]

It sounds as though the two people are standing in front of the boat on opposite sides of it, so that they both make an angle of 30.0° with the axis of the boat, as in the attached free body diagram (ignoring the force of buoyancy and the weight of the boat).

By Newton's second law, the net vertical force is

∑ F = P₁ sin(60.0°) + P₂ sin(120.0°) - R = 0

where upward is positive and downward is negative, and the right side is 0 because the boat moves with constant velocity and thus zero acceleration.

We're told that P₁ = P₂ = 600 N, and we know sin(60°) = sin(120°), so the above reduces to

R = 2 P sin(60.0°) = 2 (600 N) sin(60.0°) ≈ 1040 N

7 0

3 years ago

An egg is thrown nearly vertically upward from a point near the cornice of a tall building. It just misses the cornice on the wa

bezimeni [28]

Answer:

15.325 m/s

11.9702153415 m

0

9.81 m/s²

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

g = Acceleration due to gravity = 9.81 m/s² = a

$s=ut+\frac{1}{2}at^2\\\Rightarrow u=\dfrac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\dfrac{-46-\frac{1}{2}\times -9.81\times 5^2}{5}\\\Rightarrow u=15.325\ m/s$

The initial velocity of the egg is 15.325 m/s

$v^2-u^2=2as\\\Rightarrow s=\dfrac{v^2-u^2}{2a}\\\Rightarrow s=\dfrac{0^2-15.325^2}{2\times -9.81}\\\Rightarrow s=11.9702153415\ m$

The maximum height is 11.9702153415 m

At the highest point velocity is zero.

Magnitude of acceleration on a freely falling body is always g = 9.81 m/s²

7 0

3 years ago