icantspeakengles

16.04.2020 • 

Physics

7.
Which would take more force to stop in 10 seconds: an 8.0-kilogram ball rolling in a straight line at a speed
of 0.2 m/sec or a 4.0-kilogram ball rolling along the same path at a speed of 1.0 m/sec?
8.
The momentum of a car traveling in a straight line at 20 m/sec is 24,500 kg-m/sec. What is the car's mass?
9.
A 0.14-kilogram baseball is thrown in a straight line at a velocity of 30 m/sec. What is the momentum of the
baseball?
10. Another pitcher throws the same baseball in a straight line. Its momentum is 2.1 kg m/sec. What is the
velocity of the ball?
11. A 1-kilogram turtle crawls in a straight line at a speed of 0.01 m/sec. What is the turtle's momentum?

Plz help

Ответ:

starfox5454

24.01.2022

Physics

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7. the ball with a mass of 8.0kg

8.1225 kg

9.4.2 kg-m/sec

10.15m/sec

11.0.001kgm/sec

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Ответ:

musfirahkhurram

29.01.2021

Physics

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The maximum number of passengers that can ride in the elevator are n°= 28 passengers.

Explanation:

P= 40 HP = 29840 W

d= 20m

t= 16s

me= 600kg

mp= 65 kg

g= 9.8 m/s²

v= d/t

v= 1.25 m/s

P=F*v

P/v= F

F= 23872 N

m= F/g

m= 2435.91 kg

m= me + n° * mp

(m - me) / mp = n°

n°≅ 28 passengers

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