NIGER STATE COLLEGE OF AGRICULTURE, MOKW A PRE-ND SCIENCES DEPARTMENT FIRST SEMESTER EXAMINATION 2022/2023 SESSION COURSE CODE: CBPO11 COURSE TITLE : MECHANICS, HEAT, AND PROPERTIES OF MATER TIME: 3 HRS DATE: Monday, 07-08-2023 EXAMINER: AHMAD ABUBAKAR SOJE Instruction: answer any Five Questions 1. (a) Define the terms fundamental and derived quantities (b) Mentions four (4 each fundamental and derived quantities with their units (c) List four (4)each examples of scalar and vector quantities 2. (a) Explain terms uniform velocity acceleration and deceleration (b) A body moves from rest with an acceleration of 3ms^-2 to covered a distance of 70 m. Calculate its velocity. (c) An object thrown vertically upward from ground level to a height of 90m. How long does it take to reach the height? (Assumeg=10ms^-2) 3. (a) State the following Laws (i) Second Newton's law of motion (ii) Law of conservation of linear momentum (b) A ball of mass 0.7 Kg, travelling with a velocity of 125ms^-1 collides with another ball of mass 1.2 Kg moving with 85ms^-1 in the same direction . If they stick together after the impact, calculate their common velocity. (c) Define impulse of a force? A force of 50 N acts for 25s, calculate the change in momentum 4. (a) Explain the term moment of a force and State principles of moment (b) A uniform metre rule is found to balance horizontally at the 48cm mark. When a body of mass 60g is suspended at the 5cm mark , the balance point is found to be the 30cm mark. Calculate the mass of the metre rule.

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NIGER STATE COLLEGE OF AGRICULTURE, MOKW A PRE-ND SCIENCES DEPARTMENT FIRST SEMESTER EXAMINATION 2022/2023 SESSION COURSE CODE: CBPO11 COURSE TITLE : MECHANICS, HEAT, AND PROPERTIES OF MATER TIME: 3 HRS DATE: Monday, 07-08-2023 EXAMINER: AHMAD ABUBAKAR SOJE Instruction: answer any Five Questions 1. (a) Define the terms fundamental and derived quantities (b) Mentions four (4 each fundamental and derived quantities with their units (c) List four (4)each examples of scalar and vector quantities 2. (a) Explain terms uniform velocity acceleration and deceleration (b) A body moves from rest with an acceleration of 3ms^-2 to covered a distance of 70 m. Calculate its velocity. (c) An object thrown vertically upward from ground level to a height of 90m. How long does it take to reach the height? (Assumeg=10ms^-2) 3. (a) State the following Laws (i) Second Newton's law of motion (ii) Law of conservation of linear momentum (b) A ball of mass 0.7 Kg, travelling with a velocity of 125ms^-1 collides with another ball of mass 1.2 Kg moving with 85ms^-1 in the same direction . If they stick together after the impact, calculate their common velocity. (c) Define impulse of a force? A force of 50 N acts for 25s, calculate the change in momentum 4. (a) Explain the term moment of a force and State principles of moment (b) A uniform metre rule is found to balance horizontally at the 48cm mark. When a body of mass 60g is suspended at the 5cm mark , the balance point is found to be the 30cm mark. Calculate the mass of the metre rule.

Answer 1

1. (a) Fundamental quantities are basic physical quantities that cannot be derived from other quantities. Derived quantities are those that are derived from fundamental quantities.(b) Fundamental quantities and their units:- Length: meter (m)- Mass: kilogram (kg)- Time: second (s)- Electric current: ampere (A)Derived quantities and their units:- Velocity: meter per second (m/s)- Acceleration: meter per second squared (m/s²)- Force: newton (N)- Energy: joule (J)(c) Examples of scalar quantities:- Temperature- Mass- Time- SpeedExamples of vector quantities:- Velocity- Force- Acceleration- Displacement

Answer 2

Fundamental quantities are basic physical quantities that are not derived from other quantities, while derived quantities are those that are derived from fundamental quantities. Examples of fundamental quantities include length (meter), mass (kilogram), time (second), and electric current (ampere). Derived quantities include velocity (meter per second), acceleration (meter per second squared), force (newton), and energy (joule). Scalar quantities have only magnitude (e.g., temperature, mass), while vector quantities have both magnitude and direction (e.g., velocity, force).

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