Write TRUE if the statement is correct and FALSE if the statement is incorrect for the following physics concepts: 1. Gravity as non-contact force. 2. Newton's second law. 3. Screw velocity ratio. 4.

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Asked on April 21, 2026Physics

This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.

Accepted Answer · 2026-04-21T11:51:12.884Z

Wendimuu, let's knock this out. Here are the solutions to your physics questions: Direction I: Write TRUE if the statement is correct and FALSE if the statement is incorrect. 1. A force due to gravity is non-contact force. Answer:* True (Gravity acts without physical contact.) 2. Newton's second law formula is F=ma. Answer:* True (This is the standard formula for Newton's second law of motion.) 3. Velocity ratio of screw is VR = (2 R)/(2 r). Answer:* False (The velocity ratio of a screw jack is typically (2 L)/(p), where L is the length of the effort arm and p is the pitch of the screw. The given formula simplifies to (R)/(r), which is not correct for a screw.) 4. The machine is speed multiplier if mechanical advantage is MA > 1. Answer:* False (If the mechanical advantage (MA) is greater than 1, the machine multiplies force. If MA is less than 1, it multiplies speed.) 5. Kinetic energy given by KE=mgh. Answer:* False (mgh is the formula for gravitational potential energy. Kinetic energy is given by KE = (1)/(2)mv^2.) 6. Effort is the force you exert on a machine. Answer:* True (Effort is the input force applied to a machine.) 7. Efficiency = Mechanical advantagevelocity ratio. Answer:* True (Efficiency is also defined as the ratio of mechanical advantage to velocity ratio, = (MA)/(VR).) 8. Static friction is less than kinetic friction. Answer:* False (Static friction is generally greater than or equal to kinetic friction. It takes more force to start an object moving than to keep it moving.) 9. Power = work donetime taken. Answer:* True (This is the definition of power.) 10. Mechanical energy is the sum of kinetic energy and potential energy. Answer:* True (Mechanical energy is the total energy of motion and position.) Direction II: Choose the best answer from the given alternatives and write in a capital letter. 11. What is the acceleration of 10kg block when acted on by force of 50N? Step 1: Identify the given values. Mass m = 10 kg Force F = 50 N Step 2: Use Newton's second law of motion, F=ma. a = (F)/(m) Step 3: Substitute the values and calculate. a = 50 N10 kg = 5 m/s^2 Answer: C. 5 m/s^2 12. Which one is incorrect about a simple machine? Answer:* C. multiplies energy Explanation:* Simple machines can multiply force or speed, or change the direction of force, but they cannot multiply energy. Energy is conserved (or lost due to friction). 13. How many classes of levers are there? Answer:* A. 3 Explanation:* There

Accepted Answer · 2026-04-21T11:51:12.884Z

Wendimuu, let's knock this out. Here are the solutions to your physics questions: Direction I: Write TRUE if the statement is correct and FALSE if the statement is incorrect. 1. A force due to gravity is non-contact force. Answer:* True (Gravity acts without physical contact.) 2. Newton's second law formula is F=ma. Answer:* True (This is the standard formula for Newton's second law of motion.) 3. Velocity ratio of screw is VR = (2 R)/(2 r). Answer:* False (The velocity ratio of a screw jack is typically (2 L)/(p), where L is the length of the effort arm and p is the pitch of the screw. The given formula simplifies to (R)/(r), which is not correct for a screw.) 4. The machine is speed multiplier if mechanical advantage is MA > 1. Answer:* False (If the mechanical advantage (MA) is greater than 1, the machine multiplies force. If MA is less than 1, it multiplies speed.) 5. Kinetic energy given by KE=mgh. Answer:* False (mgh is the formula for gravitational potential energy. Kinetic energy is given by KE = (1)/(2)mv^2.) 6. Effort is the force you exert on a machine. Answer:* True (Effort is the input force applied to a machine.) 7. Efficiency = Mechanical advantagevelocity ratio. Answer:* True (Efficiency is also defined as the ratio of mechanical advantage to velocity ratio, = (MA)/(VR).) 8. Static friction is less than kinetic friction. Answer:* False (Static friction is generally greater than or equal to kinetic friction. It takes more force to start an object moving than to keep it moving.) 9. Power = work donetime taken. Answer:* True (This is the definition of power.) 10. Mechanical energy is the sum of kinetic energy and potential energy. Answer:* True (Mechanical energy is the total energy of motion and position.) Direction II: Choose the best answer from the given alternatives and write in a capital letter. 11. What is the acceleration of 10kg block when acted on by force of 50N? Step 1: Identify the given values. Mass m = 10 kg Force F = 50 N Step 2: Use Newton's second law of motion, F=ma. a = (F)/(m) Step 3: Substitute the values and calculate. a = 50 N10 kg = 5 m/s^2 Answer: C. 5 m/s^2 12. Which one is incorrect about a simple machine? Answer:* C. multiplies energy Explanation:* Simple machines can multiply force or speed, or change the direction of force, but they cannot multiply energy. Energy is conserved (or lost due to friction). 13. How many classes of levers are there? Answer:* A. 3 Explanation:* There

Write TRUE if the statement is correct and FALSE if the statement is incorrect for the following physics concepts: 1. Gravity as non-contact force. 2. Newton's second law. 3. Screw velocity ratio. 4.

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Write TRUE if the statement is correct and FALSE if the statement is incorrect for the following physics concepts: 1. Gravity as non-contact force. 2. Newton's second law. 3. Screw velocity ratio. 4.

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