Acceleration due to Gravity (g)

What is the value of acceleration due to gravity (g) near the Earth's surface, in the absence of air resistance?

• -9.8 m/s^2
• +9.8 m/s^2
• 0 m/s^2
• 32.2 ft/s^2

Why is the acceleration due to gravity (g) always directed downwards?

• Because of Earth's rotation
• Due to centripetal acceleration
• Due to gravitational force acting downwards
• Due to buoyant force

What is the relationship between the initial velocity (u), final velocity (v), acceleration (g), and displacement (s) in a free fall motion?

• v = u + at
• s = ut + 1/2 at^2
• v^2 = u^2 + 2as
• All of the above

If an object is thrown upwards, at what point during its motion does the velocity become zero?

• At the starting point
• At the maximum height
• At the midpoint of the motion
• There is no point where the velocity becomes zero

In a symmetrical upward motion, what is the relationship between the velocity at the highest point (vB) and the initial velocity (vA)?

• vB = vA
• vB = -vA
• vB = 0
• vB = 1/2 vA

For an object thrown upwards and returning to the same starting point, what is the relationship between the time taken to reach the maximum height and the time taken to return to the starting point?

• The times are equal
• The time to return is twice the time to reach the maximum
• The time to return is half the time to reach the maximum
• There is no relationship between the times

When an object is thrown upwards at the edge of a cliff, what is the relationship between the final velocity (vD) and the initial velocity (vA)?

• vD = vA
• vD = -vA
• vD = 0
• vD = 1/2 vA

What is the direction of the displacement for an object thrown upwards at the edge of a cliff?

• Upwards
• Downwards
• Zero
• Depends on the initial velocity

Why do we use the negative sign (-) for the acceleration due to gravity (g) in kinematic equations?

• To indicate the direction of the force
• To make the equations more complex
• To differentiate it from other accelerations
• To make the equations easier to solve

In the equation s = ut + 1/2 at^2, what does the 'a' represent?

• Acceleration
• Velocity
• Displacement
• Time