Question

A spring toy of weight 1kg rests on a weighing machine the toy suddenly jumps and balance reads 11n the acceleration of toy just on jumping is

Answer 1

Mass of toy = 1kg
Weight = mg = 1×9.8 = 9.8 N

When the toy suddenly jumps, the balance reads 11n.
So upward force on the toy = 11N

Now,
Upward force = 11 N
Downward force (or weight) = 9.8 N
Resultant force on toy(F) = 11 - 9.8 = 1.2 N

Acceleration= F/m = 1.2/1 = 1.2 m/s^2

Acceleration of toy just after jumping is 1.2 m/s^2.

Answer 2

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Mass of toy = 1kg

Weight = mg = 1×9.8 = 9.8 N

When the toy suddenly jumps, the balance reads 11n.

So upward force on the toy = 11N

Now,

Upward force = 11 N

Downward force (or weight) = 9.8 N

Resultant force on toy(F) = 11 - 9.8 = 1.2 N

Acceleration= F/m = 1.2/1 = 1.2 m/s^2

Acceleration of toy just after jumping is 1.2 m/s^2.