Question

A box of mass 3kg is lifted 1.5m onto a shelf. Calculate the change in its gravitational potential energy. The gravitational field strength is 10N/kg.

Answer 1

Answer:

The change in gravitational potential energy is 45 J.

Explanation:

Given that,

Mass = 3 kg

Distance = 1.5 m

Gravitational field strength = 10 N/kg

We need to calculate the change in gravitational potential energy

Using formula of  gravitational potential energy

$Change\ in\ gravitational\ potential\ energy =gravitational\ field\ strength\times mass\times distance$

Put the value into the formula

$Change\ in\ gravitational\ potential\ energy =10\times3\times1.5$

$Change\ in\ gravitational\ potential\ energy =45\ J$

Hence, The change in gravitational potential energy is 45 J.

Answer 2

The change in the box's gravitational energy is 45 joules

The parameters given in the question are;

mass= 3 kg

distance= 1.5m

gravitational potential strength= 10 N/kg

Therefore the change in potential energy can be calculated as follows;

= mass × distance × gravitational potential strength

= 3 × 1.5 × 10

= 45 joules

Hence the change in it's gravitational potential energy is 45 joules

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