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4 years ago

Physics question please show work for brainliest :)

Mathematics

1 answer:

jasenka [17]4 years ago

5 0

You can’t really show work for this problem, but the answer is A. This is because physics is about motion, energy, force and stuff and when you get in to a wreck, there are forces and stuff lol

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The formula for height, in feet of a projectile under the influence of gravity is given by h=-16t^2+vt+s, where t is the time in

kifflom [539]

Answer:

1.55s

Step-by-step explanation:

The height equation of the projectile is given as;

h = -16t^2 + vt + s .......1

where;

t is the time in seconds,

v is the upward velocity at the start,

s is the starting height.

Given;

v = 70 ft/s

s = 5 ft

Substituting the values equation 1 becomes;

h = -16t^2 + 70t + 5

For the ball to reach 75 ft, h = 0

75 = -16t^2 + 70t + 5

-16t^2 + 70t + 5 - 75 = 0

-16t^2 + 70t - 70 = 0

solving the quadratic equation;

Time t = 2.83 s and t = 1.55s

Therefore, the ball will first reach 75 ft after 1.55 seconds.

3 0

3 years ago

Help please I don't understand!!!

shusha [124]

A- 2b = 2 one of the 2 "A" most be negative so they can cancer each other
-a- b = 6 after the "A" cancel each other add the -2b with -b = -3b, then add 2
-------------- and 6
-3b=8 then you have to divide 8 by -3 = -2.6 -2.6 its b... now you have to solve for b step 1. a -2b = 2 step 2. a -2(-2.6)=2 step 3 a -5.3 = 2 then subtract -5.3 with 2 so that going to be 2 + 5.3 =7.3 then divide by a
final answer (-2.5,-7.3)
sorry its kinda hard to explained here, i hope you get the point :)

3 0

3 years ago

Two numbers are in the ratio 3:2, if the smaller number is 10. what is the bigger number?

boyakko [2]

Answer:

Step-by-step explanation:

I don't say u must have to mark my ans as brainliest but if it has really helped u plz don't forget to thank me..

3 0

3 years ago

You learned from your science teacher that water expands when you freeze it. The next time you freeze your water bottle, you lea

Nata [24]

Can you add the question to the problem?

6 0

4 years ago

Megan is 5 feet 4 inches tall. her sister is 3 feet 11 inches tall.how many more inches does megs measure than her sister?

Verizon [17]

Answer:

17 inches taller

Step-by-step explanation:

Way #1:

Megan is 5 ft 4 in = 4ft 16in

Sister is 3 ft 11 in

4-3=1ft

16-11=5 in

1 ft 5 in = 17 in

Way #2:

Megan is 5 ft 4 in = 64 in

Sister is 3 ft 11 = 47 in

64 in - 47 in

= 17 in

8 0

3 years ago