U5 Videos FP 6.1.5

What is the core principle of the Impulse Approximation during a collision?

• The net force is always zero.

• The force of impact is much smaller than other forces.

• The force of impact is much larger than all other forces, making other forces negligible.

• The collision time interval is always very long.

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When applying the Impulse Approximation to a person landing, which forces are typically considered to determine the actual normal force (force of impact)?

• Only the force of gravity.

• Only the normal force.

• The normal force and the force of gravity.

• The force of friction and air resistance.

A person with a mass of 73 kg lands with bent knees, experiencing a net force (ΣF_y) of 988.03 N during a collision. What is the normal force (F_N) exerted by the ground on the person? (Assume g = 9.81 m/s²).

• 988.03 N

• 716.13 N

• 1704.16 N

• 11782.06 N

How does the duration of a collision affect the accuracy of the Impulse Approximation?

• A longer collision time leads to a more accurate approximation.

• A shorter collision time leads to a less accurate approximation.

• A shorter collision time leads to a more accurate approximation.

• Collision duration has no effect on the approximation's accuracy.