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3 years ago

If you pedal harder so the bike tires push against the ground with

Physics

1 answer:

sdas [7]3 years ago

8 0

Answer:

friction from the ground rubs on the tire which gives it more force to move forward,

Explanation: without friction the bike wont be able to use the motion to move forward. but the tires start to wear out easily.

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A reckless coyote engineer straps on a pair of ice skates and attaches a rocket capable of producing 5.0 × 10 3 N of thrust to h

Marianna [84]

Answer:

208.33 m/s

Explanation:

t = Time taken

u = Initial velocity = 0

v = Final velocity

a = Acceleration

m = Mass of coyote and the rocket = 120 kg

F = Force of thrust produced by the rockets = $5\times 10^3\ N$

$F=ma\\\Rightarrow a=\frac{F}{m}\\\Rightarrow a=\frac{5\times 10^3}{120}\\\Rightarrow a=\frac{125}{3}\ m/s^2$

$v=u+at\\\Rightarrow v=0+\frac{125}{3}\times 5\\\Rightarrow v=208.33\ m/s$

Velocity of the rocket at 5 seconds is 208.33 m/s

3 0

3 years ago

1. A ski-plane with a total mass of 1200 kg lands towards the west on a frozen lake at 30.0

igor_vitrenko [27]

Answer:

d = 229.5 m

Explanation:

It is given that,

Total mass of a ski-plane is 1200 kg

It lands towards the west on a frozen lake at 30.0 m/s.

The coefficient of kinetic friction between the skis and the ice is 0.200.

We need to find the distance covered by the plane before coming to rest. In this case,

$\mu mg=ma\\\\a=\mu g\\\\a=0.2\times 9.8\\\\a=1.96\ m/s^2$

It is decelerating, a = -1.96 m/s²

Now using the third equation of motion to find the distance covered by the plane such that :

$v^2-u^2=2ad\\\\d=\dfrac{-u^2}{2a}\\\\d=\dfrac{-(30)^2}{2\times -1.96}\\\\d=229.59\ m$

So, the plane slide a distance of 229.5 m.

6 0

3 years ago

Question 2 of 5 Which two statements are true for both compounds and mixtures? A. They can be separated into two or more element

Alekssandra [29.7K]

Answer:

D and A

I'm not sure about A lol

7 0

2 years ago

Why is there more potential for wind energy in the upper himalayan in nepal?

exis [7]

Answer:

<em><u>The potential area of wind power in the country is about 6074 sq. km with wind power density greater than 300 watt/m2. More than 3,000 MW of electricity could be generated at 5 MW per sq km. The commercially viable wind potential of the country is estimated to be only about 448 MW.</u></em>

5 0

2 years ago

1) A person having a mass of 59.1 kg stands before a flight of 30 stairs each of which is 25.0 cm high. He runs up 20 stairs, tu

poizon [28]

Answer:

P = 147,75 W

Explanation:

A man whose mass is 59.1kg climbs up 30 steps of a stair each step is 25 cm high

Height at 30 steps , h=30×2.5= 7.5 m

Change in potential energy , =mgh=59.1×10×7.5 = 4432.5 J

So, Work done by the man , W= 4432.5J

Power used , P= $\frac{W}{T}$

P = 4432.5 /30

P = 147,75 W

Solve any question of Work, Energy and Power with:-

brainly.com/question/3854047

#SPJ1

3 0

1 year ago