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3 years ago

8

A hockey player hits a puck along the ice, giving it an initial speed of 2.9 meters per second. If there is no friction between

the puck and the ice, what will the puck’s speed be after 1.7 seconds?

1 answer:

Alborosie3 years ago

5 0

2.9 × 1.7 = 4.93

After 1.7 seconds, the puck's speed would be 4.93 meters per second.

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Can you help me please

alexira [117]

Answer:

Please check the explanation.

Step-by-step explanation:

Given that

|v|=38

Ф = 120°

<u>Finding the horizontal component</u>

The horizontal component can be obtained using the formula

Vx = |v| cos Ф

= 38 cos 120°

= 38 (-0.5)

= -19

Thus, the horizontal component is:

Vx = -19

<u>Finding the vertical component</u>

The vertical component can be obtained using the formula

Vy = |v| sin Ф

= 38 sin 120°

= 38 (0.86)

= 32.68

Thus, the vertical component is:

Vy = -19

A vector 'v' with magnitude |v| and direction Ф can be written as:

v = |v| cos Ф i + |v| sin Ф j

As

|v|=38

Ф = 120°

Thus, the vector is

v = 38 cos 120° i + 38 sin 120° j

or

v = -19 i + 32.68 j

5 0

2 years ago

A group of five people are all working on the same mathematics problem. On the night before it is due, they call each other to d

UkoKoshka [18]

Answer:

Minimum number of calls = 10

Step-by-step explanation:

Lets name the five people as A,B,C,D and E.

<u>On the night before ,each person talks to every other person atleast once that means A would talk to B,C,D and E atleast once.</u>

Lets start with A. He would talk to other 4 people which means there would be 4 phone calls made.

Now lets take B. He can talk to A,C,D and E. But A has already talked to C therefore to get minimum number of phone calls , B need not call A again. So he calls only C,D and E.

In case of C using similar logic he need to talk to only D and E.

For D , he talks to E alone.

E does not have to talk to anyone as he has already talked to everyone atleast once.

Total calls = 4 + 3 + 2 + 1

= 10

5 0

3 years ago

Find 7/8 x 1/4 write in simplest form

Sav [38]

7/8 x 1/4 =
7/32
7/32 would be the simplest form, unless they want a decimal.

5 0

3 years ago

What is 800 divided by 1000

Monica [59]

Answer:

Erm idk what you meant but the answers either 0.8 or .125

Hope this helped!

Good luck :p

~ Emmy

3 0

3 years ago

Read 2 more answers

If the values in the table below model a proportional relationship, what is the equation for the function?

Jet001 [13]

Given:

The table represents a proportional relationship.

To find:

The equation of the function.

Solution:

If y is directly proportional to x, then

$y\propto x$

$y=kx$ ...(i)

where, k is the constant of proportionality.

From the given table it is clear that the function passes through (2,1). So, the equation must be satisfied by the point (2,1).

Putting x=2 and y=1 in (i), we get

$1=k(2)$

$\dfrac{1}{2}=k$

Putting $k=\dfrac{1}{2}$ , we get

$y=\dfrac{1}{2}x$

Therefore, the correct option is A.

6 0

3 years ago