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3 years ago

Which is the main difference between cardio and strength training activities

Physics

1 answer:

Mekhanik [1.2K]3 years ago

5 0

Cardio strengthens the circulatory system while strength training strengthens muscles and boost anaerobic endurance.

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A 0.58 kg mass is moving horizontally with a speed of 6.0 m/s when it strikes a vertical wall. The mass rebounds with a speed of

Sunny_sXe [5.5K]

Answer:

$5.8\; {\rm kg\cdot m \cdot s^{-1}}$ .

Explanation:

If the mass of an object is $m$ and the velocity of that object is $v$ , the linear momentum of that object would be $m\, v$ .

Assume that the initial velocity of the mass is positive ( $6.0\; {\rm m\cdot s^{-1}}$ .) However, the direction of the velocity is reversed after the impact. Thus, the sign of the new velocity of the object would be negative- the opposite of that of the initial velocity. The new velocity would be $(-4.0\; {\rm m\cdot s^{-1}})$ .

Thus, the change in the velocity of the mass would be:

$\begin{aligned}& (\text{Change in Velocity}) \\ =\; & (\text{Final Velocity}) - (\text{Initial Velocity}) \\ =\; & (-4.0\; {\rm m\cdot s^{-1}}) - (6.0\; {\rm m\cdot s^{-1}}) \\ =\; & (-10\; {\rm m\cdot s^{-1})\end{aligned}$ .

The change in the linear momentum of the mass would be:

$\begin{aligned} & \text{change in momentum} \\ =\; & (\text{mass}) \times (\text{change in velocity}) \\ =\; & 0.58\; {\rm kg} \times (-10\; {\rm m\cdot s^{-1}}) \\ =\; & (-5.8\; {\rm kg \cdot m \cdot s^{-1}})\end{aligned}$ .

Thus, the magnitude of the change of the linear momentum would be $5.8\; {\rm kg \cdot m \cdot s^{-1}}$ .

7 0

2 years ago

Need Help pls i don't understand this question

Nastasia [14]

Answer:

I'm pretty sure the answer you selected is correct.

Explanation:

7 0

2 years ago

Read 2 more answers

A centrifuge is used to test space pilots. The centrifuge spins with a centripetal acceleration of 3.04g. If the length of the a

uranmaximum [27]

Answer:

$approx.= 25\frac{m}{s}$

Explanation:

Centripetal acceleration (a) is defined as the square of an object's velocity (V^2) divided by the distance of the object from it's point/axis of revolution (r). So:

$a=\frac{V^{2} }{r}$

which allows us to solve for the velocity:

$V=\sqrt{ar}\\ Since: a=3.04g=(3.04)(9.81),r=21;\\V=\sqrt{(3.04)(9.81)(21)} =25.02...$

3 0

3 years ago

Technician A says the charging system recharges the battery by supplying a constant and relatively low charge to the battery. Te

brilliants [131]

Answer:

Technician B is correct

Explanation:

Charging systems works on the principle of magnetism. Charging system uses electromagnetic induction to generate electrical energy.

Electromagnetic principles states that voltage will be produced when there is a motion between conductor and the magnetic field.

5 0

3 years ago

Look at the circuit diagram. What type of circuit is shown? A) open series circuit B) closed parallel circuit C) closed series c

KATRIN_1 [288]

Answer:

B. closed series circuit because the resistors are one after the other and there is no open switch.

Explanation:

3 0

3 years ago