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3 years ago

> Which activity will improve your muscle strength

Physics

1 answer:

BartSMP [9]3 years ago

8 0

Answer:

Lifting weights
Strength training
Resistance training
Heavy gardening e.g digging , shovelling

Explanation:

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You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between

Klio2033 [76]

Answer:

a) $u=0.05602\ m.s^{-1}$

b) $u'=0.0169\ m.s^{-1}$

Explanation:

Given:

mass of the ball, $m=0.4\ kg$

horizontal velocity of the ball, $u=10\ m.s^{-1}$

mass of the person, $M=71\ kg$

<u>Using the law of conservation of momentum:</u>

$m.v=(M+m).u$

$0.4\times 10=(71+0.4)\times u$

$u=0.05602\ m.s^{-1}$

Given:

rebound velocity of the ball, $v'=7\ m.s^{-1}$

Using conservation of momentum,

$m.v+M.u=m.v'+M.u'$

$0.4\times10+71\times 0=0.4\times 7+71\times u'$

$u'=0.0169\ m.s^{-1}$

4 0

3 years ago

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A 1420-kg car is traveling with a speed of 12.4 m/s. What is the magnitude of the horizontal net force that is required to bring

zzz [600]

Answer:

1419.01436 N

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

$v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{0^2-12.4^2}{2\times 78}\\\Rightarrow a=-0.98564\ m/s^2$

The force on the car

$F=ma\\\Rightarrow F=1420\times -0.98564\\\Rightarrow F=-1419.01436\ N$

Magnitude of the horizontal net force that is required to bring the car to a halt is 1419.01436 N

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3 years ago

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Anthony walks to the pizza place for lunch. He walks 1km east, and then 1 km east again. What distance did he cover? What was hi

Nady [450]

Answer:

Distance covered by Anthony is 3 km. Don't know about displacement though.

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3 years ago

Question 2 of 10

Arlecino [84]

Answer:

B: Energy that is transformed is neither created or destroyed

Explanation:

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2 years ago

What describes how to compare the energy of two different waves

Mazyrski [523]

Answer:

the answer is C

Explanation:

If you need an explanation let me know and I'll be sure to provide one

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4 years ago

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