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valentinak56 [21]
4 years ago
13

You can jump 3 m (10 feet) off of a diving board and into a swimming pool and be uninjured. However, if you jumped from the same

height onto concrete it would be very bad. Use principles of impulse and momentum to explain why this is the case.
Physics
1 answer:
Sholpan [36]4 years ago
6 0

Answer:

Explanation:

When a person jumps into a swimming pool and is uninjured while the same person is injured when he jumped from the same height onto the concrete floor, this can be explained by the impulse-momentum concept.

When a person jumps into the swimming pool, water provides cushioning and gradually decreases the velocity of a person with a considerable amount of time. While on the other hand concrete floor does not provide the cushioning effect as it is rigid.

So, force is imparted at a short amount of time causing more injury compared to the swimming pool case.

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Luba_88 [7]

You really can't tell.

Power = I^2 × R = V^2 / R ( unit in Watt)

For P = I^2 × R

Where we have P directly proportional to R, increase in Power leads to increase in R

So if we have 100 will have higher resistance

For P = V^2/R

Power is inversely proportional to resistance.

So increase in Power leads to decrease in resistance.

60 watt will have a higher resistance.

5 0
3 years ago
¿Qué significa que un automóvil viaje con una rapidez de 45[(Km.)⁄(Hr.)]?
netineya [11]

Responder:

Compruebe amablemente la explicación

Explicación:

¿Qué significa que un automóvil viaje con una rapidez de 45 [(Km.) ⁄ (Hr.)]?

Si se dice que un automóvil viaja a una velocidad de 45 km / h, entonces el automóvil cubre una distancia de 45 km en una hora. 45 km / h es una derivación de la velocidad de desplazamiento obtenida de la relación;

Velocidad = distancia / tiempo

Velocidad = 45 km / 1 h.

Distancia = velocidad × tiempo

Distancia = 45 km / h × 1 h

Distancia = 45 km

Por lo tanto, a esa velocidad, se cubrirá una distancia de 45 km por cada hora que se mueva.

4 0
3 years ago
The battery is made up of three 1.5 V cells.
IrinaVladis [17]

Answer: 4.5 V

Explanation:

Given

The voltage of each cell is 1.5 V

If they are connected end to end their potential added to give a higher potential i.e. 1.5+1.5+1.5=4.5 V

6 0
3 years ago
How much power does an Ox pulling a plow 20 m cross a field, exerting 120J of work over a period of 15 s?​
Aleksandr-060686 [28]

Answer:

8W

Explanation:

Given parameters:

Distance covered  = 20m

Work done  = 120J

Time  = 15s

Unknown:

How much power does the Ox exerts  = ?

Solution:

Power is the rate at which work is being done

  Power  = \frac{Work done }{time}  

 Power exerted by ox  = \frac{120}{15}   = 8W

3 0
3 years ago
Arightward force of 302 N is applied to a 28.6-kg crate to accelerate it across the floor. What will its acceleration be?
Musya8 [376]

Answer:

a \approx 10.6 m/s²

Explanation:

Since F = ma (Force = mass * acceleration), acceleration would be...

a = F/m

a = 302 N/28.6

a \approx 10.6 m/s²

8 0
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