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klio [65]
3 years ago
7

What advice would a personal trainer give you before a workout?

Physics
2 answers:
Katen [24]3 years ago
6 0

Answer:

Have a quick snack an hour before to get the energy, warm up

yulyashka [42]3 years ago
6 0

Answer:

stretch at the end of your workout

You might be interested in
Attempt 2 You have been called to testify as an expert witness in a trial involving a head-on collision. Car A weighs 15151515 l
Natasha_Volkova [10]

Answer:

v = 28.98 ft / s

Explanation:

For this problem we must solve it in parts, let's start by looking for the speed of the two cars after the collision

In the exercise they indicate the weight of each car

          Wₐ = 1500 lb

          W_b = 1125 lb

Car B's velocity from v_b = 42.0 mph westward, car A travels east

let's find the mass of the vehicles

             W = mg

             m = W / g

             mₐ = Wₐ / g

             m_b = W_b / g

             mₐ = 1500/32 = 46.875 slug

             m_b = 125/32 = 35,156 slug

Let's reduce to the english system

             v_b = 42.0 mph (5280 foot / 1 mile) (1h / 3600s) = 61.6 ft / s

We define a system formed by the two vehicles, so that the forces during the crash have been internal and the moment is preserved

we assume the direction to the east (right) positive

initial instant. Before the crash

           p₀ = mₐ v₀ₐ - m_b v_{ob}

final instant. Right after the crash

           p_f = (mₐ + m_b) v

the moment is preserved

           p₀ = p_f

           mₐ v₀ₐ - m_b v_{ob} = (mₐ + m_b) v

           v = \frac{ m_a \ v_{oa} - m_b \ v_{ob}  }{ m_a +m_b}

we substitute the values

           v = \frac{ 46.875}{82.03} \ v_{oa} -  \frac{35.156}{82.03} \ 61.6

           v = 0.559 v₀ₐ - 26.40                  (1)

Now as the two vehicles united we can use the relationship between work and kinetic energy

the total mass is

              M = mₐ + m_b

              M = 46,875 + 35,156 = 82,031 slug

starting point. Jsto after the crash

              K₀ = ½ M v²

final point. When they stop

             K_f = 0

The work is

             W = - fr x

the negative sign is because the friction forces are always opposite to the displacement

Let's write Newton's second law

Axis y

           N-W = 0

           N = W

the friction force has the expression

            fr = μ N

we substitute

            -μ W x = Kf - Ko

             

            -μ W x = 0 - ½ (W / g) v²

            v² = 2 μ g x  

            v = \sqrt{ 2 \ 0.750 \ 32 \ 17.5}Ra (2 0.750 32 17.5  

            v = 28.98 ft / s

3 0
2 years ago
Suppose the universe were completely empty except for one object- a solid sphere moving through space at a speed of 100km/s. wha
vladimir2022 [97]

Straight linear path

Explanation:

If the universe were completely empty with just one object which is solid moving sphere  through the space at a speed of 100km/s, it will move along on a straight path.

An object will continue on a straight path or at rest unless acted upon by an external force. This is the first law of newton.

  • Since there is no other mass or body in the universe, it will move along in a straight line.
  • Our planet and other bodies moves in parabolic path and elliptical orbits because they are attracted by the gravitational forces of other bodies.
  • Any body with mass will attract other bodies and makes it move round it.
  • The body with the less mass will orbit in the vicinity of the larger mass.
  • But if we have just one body out there, there is no attraction from any other body, it will continue along it's straight path.

learn more:

Gravitational force brainly.com/question/4417434

#learnwithBrainly

8 0
3 years ago
PLEASE HELP ASAP!!
maria [59]

Velocity is displacement over time, so do 60/8 to get 7.5 yards per second, and remember to add the direction the ball is traveling in.

3 0
3 years ago
How do organisms use geosphere?
stich3 [128]
Plants (biosphere) draw water (hydrosphere) and nutrients from the soil (geosphere) and release vapor into the atmosphere. Humans expend some energy arranging bricks and wood (geosphere and biosphere) into buildings.
6 0
3 years ago
The theory of continental drift proposes that the Earth's continents may have once been united as a supercontinent but have drif
JulijaS [17]

Answer:

Alfred Wegener proposed that the continents were once united into a single supercontinent named Pangaea, meaning all earth in ancient Greek. He suggested that Pangaea broke up long ago and that the continents then moved to their current positions. He called his hypothesis continental drift.

Explanation:

hope it was helpful

6 0
3 years ago
Read 2 more answers
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