A polar bear weighing 750 kg jumps over an obstacle 1.2 m high. What energy does it expend during such a jump?

To find the energy expended by a polar bear to make a jump, we use the formula: E = ΔEp = m * g * Δh.

Const: q – acceleration due to gravity (approx. Q ≈ 9.8 m / s2).

Data: m is the mass of the considered polar bear (m = 750 kg); Δh – the height of the obstacle, change in the height of the position of the bear (Δh = 1.2 m).

Let’s make a calculation: E = m * g * Δh = 750 * 9.8 * 1.2 = 8820 J or 8.82 kJ.

Answer: To make a jump, a polar bear must expend 8.82 kJ of energy.