3 years ago

Which of the following is the time it takes to complete a cycle of motion

Physics

1 answer:

White raven [17]3 years ago

7 0

Answer: B

Explanation:

You might be interested in

A 4.2-m-diameter merry-go-round is rotating freely with an angular velocity of 0.79 rad/s . Its total moment of inertia is 1790

Nezavi [6.7K]

Answer:

$w_2=0.467rad/s$

Explanation:

Four people standing on the ground each of mass and usually this questions have to find the final angular velocity

$m_t=4*70kg=280kg$

The radius $r=4.2/2=2.1m$

Angular velocity $w_1=0.79rad/s$

The moment of inertia total is $I_t=1790 kg/m^2$

Momento if inertia

$I_1=m_t*r^2$

$I_1=280kg*(2.1m)^2=1234.8kg*m^2$

Angular momentum

$I_1*w_1=I_t*w_2$

Solve to w2

$w_2=\frac{I_1*w_1}{I_t}$

$w_2=\frac{1790kg*m^2*0.79rad/s}{3024.8kg*m^2}$

$w_2=0.467rad/s$

8 0

3 years ago

Which strategies maximize recovery following an intense bout of resistance training?

RoseWind [281]

Answer:

The answers are:

a) drinking 20–24 ounces of water for every pound of body mass lost,

b) stretching muscle groups, holding each stretch for 30 seconds or more, and

c) replenishing low blood sugar with carbohydrates

Explanation:

I just took the exam and got this correct.

8 0

3 years ago

A car has an initial velocity of 10m/s. It accelerates at a rate of 2m/s2 until it reaches 30m/s. How far does it travel and for

Anna [14]

Answer:

acceleration=(v final-vinitial)/time

a=(vf-vi)/t

2=(30-10)/t

2=20/t

t=20/2=10 seconds

distance=v0t+at²/2

d=10 x 10+ 2x 10²/2=100+100= 200 m

Explanation:

7 0

2 years ago

A horizontal force F is used to pull a 5 kg block across a floor at constant speed of 3 m/s. The frictional force between the bl

horrorfan [7]

Answer:

5× 3 over 10 = 1.5

Explanation:

F = 1m/s × kg over n

7 0

3 years ago

If the length of a pendulum is doubled,what will be the change in its time period??

Phantasy [73]

Explanation:

see the attachment.. hope it will help you

6 0

3 years ago