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mixer [17]
3 years ago
5

A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr. If both animals are running at fullspeed, with the gaz

elle 70.0 m ahead, how long before the che
Physics
1 answer:
brilliants [131]3 years ago
6 0

Answer:

12.6 seconds

Explanation:

With respect to the gazelle, the cheetah has a relative speed of 100 - 80 = 20 km/hr.

We convert from km/hr to m/s.

\dfrac{20000\text{ m}}{3600\text{ s}} = \dfrac{50}{9}\text{ m/s}

At this relative speed, the cheetah will overtake the gazelle in time <em>t</em> given by

v= \dfrac{d}{t}

<em>d</em> is the distance and <em>v</em> is the relative speed.

t = \dfrac{d}{v} = \dfrac{70.0}{50/9} = 12.6\text{ s}

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Tom Cruise jumped from one building to other building while filming the roof chase scene in Mission: Impossible - Fallout. He di
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Answer:

v_0=9.9\ m.s^{-1}

Explanation:

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putting the respective values

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v_0=9.9\ m.s^{-1} is the velocity with which Tom should jump to land on the other roof.

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What is a lack of physical, social, or economic access to safe and nutritious foods called? A) famine B) food security C) food s
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A 6 m long, uniform ladder leans against a frictionless wall and makes an angle of 74.3 ◦ with the floor. The ladder has a mass
olganol [36]

Answer: µ=0.205

Explanation:

The horizontal forces acting on the ladder are the friction(f) at the floor and the normal force (Fw) at the wall. For horizontal equilibrium,

f=Fw

The sum of the moments about the base of the ladder Is 0

ΣM = 0 = Fw*L*sin74.3º - (25.8kg*(L/2) + 67.08kg*0.82L)*cos74.3º*9.8m/s²

Note that it doesn't matter WHAT the length of the ladder is -- it cancels.

Solve this for Fw.

0= 0.9637FwL - (67.91L)2.652

Fw=180.1/0.9637

Fw=186.87N

f=186.81N

Since Fw=f

We know Fw, so we know f.

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910.22N

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186.81/910.22

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