Final answer:
In this scenario, a 3 kg block is sent up a ramp inclined at 30° from the horizontal. The block's acceleration is influenced by both gravity and the ramp's angle, and friction may also influence its movement.
Step-by-step explanation:
In this scenario, we have a 3 kg block being sent up a ramp inclined at an angle of 30° from the horizontal. The block's acceleration is not zero (option a), but is influenced by both gravity and the ramp's angle (options b and c). Friction may also influence the block's movement (option d).
When an object is on an inclined plane, gravity acts on it and can be resolved into two components: one perpendicular to the plane and one parallel to the plane. The component of gravity parallel to the ramp will cause the block to move down the ramp, while the component perpendicular to the ramp will compress the block into the ramp.
Friction is the force that opposes the motion between two surfaces in contact. In the case of a block on a ramp, friction can slow down or accelerate the block depending on its direction. When the block is moving up the ramp, friction acts in the opposite direction of the block's motion, making it harder for the block to move. When the block is moving down the ramp, friction acts in the same direction as the block's motion, aiding its movement.