With one exception, each of the following units can be used to express mass. Wha

Question

With one exception, each of the following units can be used to express mass. What is the exception? A) newton B) slug C) gram D) N middot s^2/m E) kilogram Complete the following statement: The term net force most accurately describes A) the mass of an object B) the inertia of an object. C) the quantity that causes a displacement. D) the quantity that keeps an object moving. E) the quantity that changes the velocity of an object. A net force is required to give an object with mass m an acceleration a. If a net force 6 is applied to an object with mass 2m, what is the acceleration on this object? A) B) 2 C) 3 D) 4 E) 6 A net force of 25 N is applied for 5.7 s to a 12-kg box initially at rest. What is the speed of the box at the end of the 5.7-s interval? A) 1.8 m/s B) 12 m/s C) 3.0 m/s D) 7.5 m/s E) 30 m/s A 975-kg car accelerates from rest to 26.7 m/s in a distance of 120 m. What is the magnitude of the average net force acting on the car? A) 740 N B) 2900 N C) 91 N D) 1300 N E) 7900 N A 2150-kg truck is traveling along a 55.0 km/h when the driver removes his truck's speed is 33.0 km/h. What is the on the truck during the 21.0 s interval? A) 2250 N B) 626 N C) 1890 N

Explanation / Answer

a) N is the unit for force F. This is the exception.

Slug -mass accelerated by 1ft/s^2 when 1lbf is applied on it. So it represent the mass.

gm, kg are the direct units of mass.

N-s^2/m = kg-m-s^2/m-s^2= kg so it is the unit of mass.

So except Newton each and every unit represent the mass.

2) when we apply the force it accelerated the object. The acceleration gives the information about the velocity changes.

Ans: e

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