Understanding Free Fall and Kinematic Equations

What is the primary force acting on an object in free fall?

• Magnetic force

• Air resistance

• Gravity

• Friction

In the absence of air resistance, how do a feather and a bowling ball fall?

• They do not fall

• They fall at the same rate

• The bowling ball falls faster

• The feather falls faster

What is the standard value of gravitational acceleration used in calculations on Earth?

• 9.81 m/s²

• 10.5 m/s²

• 7.5 m/s²

• 8.9 m/s²

Which kinematic equation is used when time is not a required variable?

• v² = u² + 2as

• s = ut + 1/2 at²

• s = vt - 1/2 at²

• v = u + at

If you drop an object from a height, what is its initial velocity?

• 9.81 m/s

• 0 m/s

• Depends on the height

• 10 m/s

When an object is thrown upwards, what is its velocity at the highest point?

• Negative velocity

• Equal to initial velocity

• Zero

• Maximum velocity

What happens to the velocity of an object thrown upwards as it reaches its peak?

• It increases

• It becomes negative

• It remains constant

• It decreases to zero

In a free fall problem, if an object is thrown downwards, what is known about its acceleration?

• It is negative 9.81 m/s²

• It is zero

• It is positive

• It depends on the object's mass

How do you determine the displacement of an object in a free fall problem when it returns to its starting point?

• It is negative

• It is twice the height

• It is equal to the height

• It is zero

What is the final velocity of a marble dropped from a height of 380 meters, assuming no air resistance?

• 86.3 m/s upwards

• 9.81 m/s

• 86.3 m/s downwards

• 0 m/s