Ask question

Ask question

All categories

2 years ago

12

A dog is running. His human calls to him and he accelerates at 2.74 m/s/s. 3.63 seconds later, his velocity is 10.3 m/s. What wa

s his initial velocity

1 answer:

Harlamova29_29 [7]2 years ago

8 0

Answer:

0.35 m/s

Explanation:

A = v-u/t

2.74 = 10.3 - u/3.63

x 3.63

2.74 x 3.63 = 10.3 - u

+u (both sides)

u + (2.74x3.63) = 10.3

- (2.74 x 3.63)

u = 10.3 - (2.74 x 3.63)

u = 0.3538

u = 0.35 to 2d.p

Hope this helps!

You might be interested in

WILL GIVE BRAINLIEST!

ella [17]

A. momentum = mass x velocity
b. kinetic energy = 1/2 x mass x velocity^2
Although total momentum is conserved, total kinetic energy is not necessarily equal. It’s because Jay acted a force on the skateboard and increased the energy of the system.

5 0

3 years ago

WILL GIVE BRAINLIEST!!!

myrzilka [38]

Answer is d)
...................

6 0

3 years ago

Read 2 more answers

A 180-ohm resistor has 0.10 A of current in it. what is the potential difference across the resistor

Firlakuza [10]

We know V=IR (Ohm's law).

We are given R=180Ω and I=0.1A, then V=(0.1AΩ)(180Ω). Therefore

V=18V

5 0

3 years ago

A key falls from a bridge that is 45 m above the water. the key falls straight down and lands in a model boat traveling at a con

erastova [34]

Let the key is free falling, therefore from equation of motion

$h = ut +\frac{1}{2}gt^2.$ .

Take initial velocity, u=0, so

$h = 0\times t + \frac{1}{2}g t^2= \frac{1}{2}gt^2$ .

$h = 0\times t + \frac{1}{2}g t^2= \frac{1}{2}gt^2 \\\ t =\sqrt{\frac{2h}{g} }$

As velocity moves with constant velocity of 3.5 m/s, therefore we can use formula

$d= v \times t$

From above substituting t,

$d = v \times \sqrt{\frac{2h}{g} }$ .

Now substituting all the given values and g = 9.8 m/s^2, we get

$d = 3.5 \ m/s \times \sqrt{\frac{2 \times 45 m}{9.8 m/s^2} } = 10.60 m$ .

Thus, the distance the boat was from the point of impact when the key was released is 10.60 m.

7 0

3 years ago

A horse pulls a plow with a 242 N force for

prohojiy [21]

Answer: The answer is D

Explanation: i had the same question and i just guessed and got it first try

4 0

3 years ago