A 10 kg block on a rough surface (mu_k = 0.3) is pulled by a horizontal force of 50 N. The acceleration is: (g = 10 m/s^2)

A block slides down a smooth incline at 30 degrees. The acceleration is: (g = 10 m/s^2) <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 180" style="max-width:320px;margin:0.5em auto;display:block;"> <title>Block on smooth incline</title> <rect width="320" height="180" fill="#faf9f5" rx="6"/> <defs><marker id="ah-q28-02" markerWidth="8" markerHeight="6" refX="8" refY="3" orient="auto"><polygon points="0 0, 8 3, 0 6" fill="#c6613f"/></marker></defs> <polygon points="30,160 270,160 270,55" fill="none" stroke="#14140f" stroke-width="1.5"/> <g transform="rotate(-23.5,185,100)"> <rect x="162" y="78" width="42" height="30" fill="#f0e8e0" stroke="#14140f" stroke-width="1.5" rx="3"/> <text x="183" y="98" text-anchor="middle" font-size="11" font-family="sans-serif" fill="#14140f">m</text> </g> <line x1="183" y1="108" x2="183" y2="155" stroke="#c6613f" stroke-width="1.5" marker-end="url(#ah-q28-02)"/> <text x="187" y="148" font-size="10" font-family="sans-serif" fill="#c6613f">mg</text> <line x1="190" y1="105" x2="215" y2="116" stroke="#c6613f" stroke-width="1" stroke-dasharray="3,3"/> <text x="218" y="126" font-size="9" font-family="sans-serif" fill="#c6613f">mg sin30</text> <path d="M238,160 A32,32 0 0,0 250,145" fill="none" stroke="#14140f" stroke-width="1"/> <text x="233" y="153" font-size="10" font-family="sans-serif" fill="#14140f">30&#176;</text> <text x="50" y="30" font-size="10" font-family="sans-serif" fill="#788c5d">Smooth (no friction)</text> </svg>

A 50 kg person in an elevator accelerating upward at 3 m/s^2. The scale reads: (g = 10 m/s^2)

A 5 kg block on a smooth table connected to a 2 kg hanging mass. Acceleration is: (g = 10 m/s^2) <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 160" style="max-width:320px;margin:0.5em auto;display:block;"> <title>Block on table with hanging mass</title> <rect width="320" height="160" fill="#faf9f5" rx="6"/> <line x1="20" y1="65" x2="230" y2="65" stroke="#14140f" stroke-width="2"/> <rect x="20" y="65" width="210" height="10" fill="#e8e0d4"/> <rect x="90" y="30" width="55" height="35" fill="#f0e8e0" stroke="#14140f" stroke-width="1.5" rx="3"/> <text x="117" y="53" text-anchor="middle" font-size="10" font-family="sans-serif" fill="#14140f">5 kg</text> <line x1="145" y1="47" x2="240" y2="47" stroke="#14140f" stroke-width="1.5"/> <circle cx="246" cy="65" r="10" fill="none" stroke="#14140f" stroke-width="1.5"/> <line x1="256" y1="65" x2="256" y2="115" stroke="#14140f" stroke-width="1.5"/> <rect x="234" y="115" width="44" height="28" fill="#f0e8e0" stroke="#14140f" stroke-width="1.5" rx="3"/> <text x="256" y="134" text-anchor="middle" font-size="10" font-family="sans-serif" fill="#14140f">2 kg</text> </svg>

In an Atwood machine with masses 4 kg and 6 kg, the acceleration is: (g = 10 m/s^2)