1.7.1a Energy stores and energy transfers

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Question 35

A dolphin has a mass of $kg120\text{ kg}$ .

The dolphin leaps vertically out of the water, leaving the surface with a kinetic energy of $J2160\text{ J}$ .

Calculate the speed of the dolphin as it leaves the water.

[2]

Calculate the maximum height gained by the dolphin. Ignore air resistance. (Take $9.8\text{ m/s}^2$ or $m/s210\text{ m/s}^2$ ).

[2]

After the dolphin has re-entered the water, it eventually comes to rest and has lost nearly all its original kinetic energy. State what has happened to this lost energy.

[1]

Another dolphin, of much greater mass, leaves the water vertically with the same initial speed.

State and explain how the maximum height of this dolphin's jump compares to the height reached by the first dolphin.

[2]

A dolphin has a mass of $kg120\text{ kg}$ .

The dolphin leaps vertically out of the water, leaving the surface with a kinetic energy of $J2160\text{ J}$ .

Calculate the speed of the dolphin as it leaves the water.

[2]

Calculate the maximum height gained by the dolphin. Ignore air resistance. (Take $9.8\text{ m/s}^2$ or $m/s210\text{ m/s}^2$ ).

[2]

After the dolphin has re-entered the water, it eventually comes to rest and has lost nearly all its original kinetic energy. State what has happened to this lost energy.

[1]

Another dolphin, of much greater mass, leaves the water vertically with the same initial speed.

State and explain how the maximum height of this dolphin's jump compares to the height reached by the first dolphin.

1.7.1a Energy stores and energy transfers

Question 35

Markscheme

1.7.1a Energy stores and energy transfers

Question 35

Markscheme

1.7.1a Energy stores and energy transfers

Question 35

1.7.1a Energy stores and energy transfers Questions

1.7.1a Energy stores and energy transfers

Question 35

1.7.1a Energy stores and energy transfers Questions