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weqwewe [10]
3 years ago
15

Explain why muscles need more blood during exercise. Give three reasons.

Physics
1 answer:
mario62 [17]3 years ago
7 0
Use goo glle it is everything u have asked for trust! N let me know if my answer helped:)
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PHYSICS HELP PLEASE! will vote brainliest if valid answer! and 20pts!
7nadin3 [17]
The force that pulls the wagon is the horizontal component of the actual force, which is 290*cos(32) = 246N 

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Which way does wind blow
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a ball is thrown horizontally from a 20 m high building with a speed of 5.0 m/s. How far from the base of the building does the
kipiarov [429]
Given:
Dy= 20 m
Vi = 5.0 m/s horizontally
A=9.81 m/s^2

Find:
Horizontal displacement

Solution:
D=ViT+(1/2)AT^2
Dy=(1/2)AT^2
T^2=Dy/(1/2)A
T=sqrt(Dy/(1/2)A)
T=sqrt(20/4.905)
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Dx=ViT
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7 0
3 years ago
Can some answer 7 a and b please
pav-90 [236]

Answer:

a.After 15 second Mr Comer's speed =  1.7 m/s

b.Distance travelled by Mr.Comer in 15 seconds  =   18.75\ m

Explanation:

a. Lets recall our first equation of motion V_{f} =V_{i} + at

Now we know that V_{i} = 0.8m/s , a = 0.06\ m/s^2 and

t = 15 \ sec

Plugging the values we have.

V_{f} =V_{i} + at

V_{f} =0.8 + 0.06 \times 15

V_{f} =0.8+ 0.9

V_{f} =1.7 m/s

Then Mr.Comer's speed after 15 sec = 1.7ms^-1

b.

Lets find the distance and recall our third equation of motion.

V_{f} ^2-V{i}^2 = 2as

So s = distance covered.

Dividing both sides with 2a we have.

\frac{V_{f} ^2-V{i}^2}{2a} = 2as

Plugging the values.

\frac{(1.7)^2-(0.8)^2}{2\times0.06} = 2as

s= 18.75\ m

So Mr.Comer will travel a distance of s= 18.75\ m.

4 0
3 years ago
What is the kinetic energy f a 25kg object movingat a velocity of 10m/s?
alex41 [277]
Using K.E=1/2MV^2
answer is 125joules
5 0
4 years ago
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