2. An object is in equilibrium. Which of the following statements might be true

Question

2. An object is in equilibrium. Which of the following statements might be true for this object? (a) Only one physical force acts on the object. (b) Only two perpendicular forces act on the object. (c) Only two forces, in exactly the same direction, act on the object (d) Only three physical forces act on the object.

3. Consider the drawing of a car moving around a corner. In which direction is its acceleration? (a) 1 (b) 2 (c) 3 (d)

4 2015 4. A person whose mass is 50 kg is being accelerated vertically upward by a rope. The tension in the rope is 750 N. What is the magnitude of the acceleration? (a) 2.7 m/s 2 (b) 5.2 m/s 2 (c) 15.2 m/s 2 (d) 24.8 m/s

Explanation / Answer

here,

QUESTION 2 :
(a) Only one physical force acts on the object.
(b) Only two perpendicular forces act on the object.
(c) Only two forces, in exactly the same direction, act on the object
(d) Only three physical forces act on the object.

at equilibrium, there are no net forces on the object
if there are no net forces, there is no acceleration.
so all options are not True.

QUESTION 3 :
No figure is given

QUESTION 4 :
From newton second law Fnet = m*a
T - mg = ma (Where, T is tension and m is mass)

Solving for acceleration, a :
a = (T - mg) / m
a = ( 750 - (50*9.8) ) / 50
a = 5.2 m/s^2

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