Ages 12–13🔬 Science67 verified questions on this shelf
Newton's First & Second Laws
State and apply Newton's First Law (an object stays at rest or constant velocity unless acted on by a resultant force) and Second Law (force = mass × acceleration), including the relationship between mass, force, and acceleration
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Question 1 of 3
A 2.0‑kg block rests on a horizontal surface. A horizontal force of 10 N pulls the block to the right, while kinetic friction exerts a 2 N force opposite the motion. What is the magnitude of the block’s acceleration?
Question 2 of 3
A cart of constant mass 4.0 kg is pushed with different net forces. When a net force of 8.0 N is applied, the cart accelerates at 2.0 m/s². When a net force of 12.0 N is applied, the cart accelerates at 3.0 m/s². Which equation best describes the relationship among net force (F), mass (m), and acceleration (a) for this cart?
Question 3 of 3
A net horizontal force of 30 N pushes a 6‑kg crate across a frictionless floor. What is the magnitude of the crate’s acceleration?
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