The flowers of the bunchberry plant open with astonishing force and speed, causing the pollen grains to be ejected out of the flower in a mere 0.30 ms at and acceleration of 2.5×104m/s2. if the acceleration is constant, what impulse in 10−10kgm/s is delivered to a pollen of mass 1.0×10−7g? (do not include unit in answer)

Explanation:

The impulse is given by:

(1)

Where:

is the mass of the pollen

is the velocity of the pollen

On the other hand, we know acceleration is:

(2)

Where is the time and

Then: (3)

Substituting (3) in (1):

(4)

(5)

Finally:

Impulse : 7.5.10⁻¹⁰N.s

Momentum is the product of the mass of an object and its velocity

Whereas impulse is defined is the product of the force with the time interval when the force is acting on the object.

the pollen grains to be ejected out of the flower in 0.30 ms and acceleration of 2.5 × 10⁴ m/s², then

Δt = 0.3 ms = 3.10⁻⁴ s

a = 2.5 × 10⁴ m/s²

mass of pollen: 1.0 × 10⁻⁷g = 1.0 x 10⁻¹⁰ kg

then:

A force that works according to Newton's second law:

Impulse (I) :

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