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2 years ago

What is the average speed of a cheetah that Sprint's 100m in 4 seconds How about if it sprints 50m in two seconds

Physics

2 answers:

Kay [80]2 years ago

8 0

Answer:

$25m/s$ in both cases

Explanation:

The formula for the average speed is:

$velocity=\frac{distance}{time}$

For the first scenario distance is 100m and time is 4 seconds, the velocity is:

$velocity =\frac{100m}{4s}=25m/s$

For the second scenario the distance is 50m and the time is 2 seconds, so the velocity:

$velocity=\frac{50m}{2s} =25m/s$

The average speed is the sane for the two scenarios described.

Liono4ka [1.6K]2 years ago

6 0

Speed = distance/time

So for 1) 100m divided by 4 is 25 so the cheetah was travelling 25m/s

2) is the same concept: 50/2 = 25 so the cheetah was travelling at 25m/s

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Gnom [1K]

Answer:

d. 37 °C

Explanation:

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$c_{m}$ = specific heat of lump of metal = 0.25 cal/g°C

$T_{mi}$ = Initial temperature of lump of metal = 70 °C

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$c_{w}$ = specific heat of water = 1 cal/g°C

$T_{wi}$ = Initial temperature of water = 20 °C

$m_{c}$ = mass of calorimeter = 500 g

$c_{c}$ = specific heat of calorimeter = 0.10 cal/g°C

$T_{ci}$ = Initial temperature of calorimeter = 20 °C

$T_{f}$ = Final equilibrium temperature

Using conservation of heat

Heat lost by lump of metal = heat gained by water + heat gained by calorimeter

$m_{m} c_{m} (T_{mi} - T_{f}) = m_{w} c_{w} (T_{f} - T_{wi}) + m_{c} c_{c} (T_{f} - T_{ci}) \\(250) (0.25) (70 - T_{f} ) = (75) (1) (T_{f} - 20) + (500) (0.10) (T_{f} - 20)\\T_{f} = 37 C$

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2 years ago

Two balls with charges +Q and +4Q are separated by 3R. Where should you place another charged ball Q0 on the line between the tw

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Answer:

To avoid slipping while playing badminton or to increase friction between the shoes and the badminton court or to enhance the grip.

Explanation:

As the question is general so I will try answer it generally.

As badminton court is usually slippery and flat with no or very little friction and while playing badminton, players have to move very fast from place to place.

So, in order to effectively move faster to take the difficult shots with accuracy badminton players increase the friction between their shoes and the badminton court by shuffling resin to their shoes. It helps to enhance the grip.

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2 years ago

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Answer:

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