In a race, Helen (45 kg) starts from rest and accelerate for a few meters. Once

Question

In a race, Helen (45 kg) starts from rest and accelerate for a few meters. Once she reaches the top speed of 8 m/s, she maintains the speed until she finishes the race. She then slowed down gradually to stop. The following graph shows the data collected by the force sensor on her Nike smart shoes. What is the entire region where Helen is accelerating? 0 to 9 m 0 to 36 m 9 to 27 m 27 to 36 m What is the entire region where Helen is running at constant speed? 9 to 27 m 27 to 36 m 36 to 108 m 144 m ton What is the entire region where Helen is decelerating to stop? 27 to36m 36 to 108m 108 m to x 135m to x What is Helen's kinetic energy at 36 m? What is F_1? What is Helen's kinetic energy at 80 m? What is Helen's kinetic energy at 27 m? Find x where Helen comes to a complete stop. Sketch Helen's kinetic energy.

Explanation / Answer

here,

a)

the region where Helen is accelrating is a. 0 to 9 m

b)

the entir region where Helen is running with constant speed is a. 9 to 27 and c. 36 to 108
m

c)

the entire region where Helen is deaccelrating to stop is a. 27 to 36 m

d)

at x = 36 m,

mass of Helen , m = 45 kg

f is zero at x = 36 m

so , the kinetic energy is zero

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.