QUESTION 1

1. When a particle undergoes a uniformly ?/ decelerated motion, with acceleration ?/ ?a, ?travelled at constant ?delta t increase / decrease at constant ?a*(delta t) squared?

5 points ?

QUESTION 2

1. When the net force on a body is zero, the body will accelerate?

   ?True? ??False

2 points ?

QUESTION 3

1. A book rests on top of the table and a child starts pushing the book across the table top.

   Which forces must not appear on the free body diagram of the book?

   	a.	the child?s pushing force
   	b.	The book?s weight
   	c.	none of a), b), c) and d).
   	d.	the normal reaction of the table top ??
   	e.	All of a), b) and c).

1 points ?

QUESTION 4

1. A plane takes off at an angle of 45? from a horizontal runway and keeps this direction following a straight path 10 km long. How high is the plane above the horizontal ground surface?

   a.

   10?km?

   ?

   b.

   5 km?

   ?

   c.

   ?km ?

   ?

   d.

   ??km?

   ?

   e.

   ?None of (a), (b), (c), and (d)

   ?

1 points ?

QUESTION 5

1. A Newton is equivalent to which of the following?

   	a.	Kilogram-meter per second squared?
   	b.	Kilograms-meter per secon
   	c.	None of the above?
   	d.	Kilogram per meter second?
   	e.	Meter per second squared?

1 points ?

QUESTION 6

1. A horse is accelerating a cart loaded with hay, at a m/s2. The empty cart mass is 100 kg and the hay?s mass is 500kg. Assuming the horse?s force remains constant, what would be the acceleration of the cart, if the fell sideway off the cart?

   A.

   a m/s2? ? ? ? .

   ?

   B.

   None of A, B, C and D.

   ?

   C.

   a/6 m/s2? ? ??

   ?

   D.

   6a m/s2? ? ? ?

   ?

   E.

   5a m/s2? ? ? ?

   ?

1 points ?

QUESTION 7

1. A boy throws a stone from ground level, vertically upward in space, ?with a velocity of 6m/s. How long will the stone last in space?

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2 points ?

QUESTION 8

1. Which of the following quantities is equivalent to 3 Mg (megagrams)?

   a.

   None of a, b, c and d

   ?

   b.

   3000000 mg?

   ?

   c.

   30000 kg

   ?

   d.

   3 tonnes?

   ?

   e.

   0.3 Gg

   ?

1 points ?

QUESTION 9

1. The forces in a couple must be:

   	a.	parallel and non-collinear
   	b.	opposite in direction
   	c.	All of a), b) and c)
   	d.	none of a), b), c) and d)
   	e.	equal in magnitude

1 points ?

QUESTION 10

1. A man stands on a lift which is descending at constant speed. If the push of the lift on the man is P and the pull of the earth on him is W, then the net force on the man is:

   	a.	A fraction of W vertically downward?
   	b.	Zero?
   	c.	None of the above?
   	d.	Slightly greater than W, vertically downwards
   	e.	Slightly greater than P, vertically upwards?

1 points ?

QUESTION 11

1. A force launches a rocket vertically up in the space. ?The rocket's acceleration is twice the gravity constant. This force accelerating the rocket from the ground is equivalent to:

   	a.	None of the above?
   	b.	Three times the rocket's weight?
   	c.	Half of the rocket's weight?
   	d.	The rocket's weight exactly?
   	e.	Twice of the rocket's weight?

1 points ?

QUESTION 12

1. An object launched in space goes beyond its maximum height, ?and when its acceleration becomes zero, it returns to the ground?

   ?True

   ?False

2 points ?

QUESTION 13

1. 1. ?A farm of banana has a form of trapezium where the bigger base and the smaller base are 600,00 m and 400,00 m respectively. The width of the farm is 300.00 m. The surface area of the farm at three significant digits is:?

   a.

   0.15 x 106 m2?

   ?

   b.

   150 x 103 m2 ?

   ?

   c.

   1.50 x 105 m2?

   ?

   d.

   150000 m2

   ?

   e.

   None of (a), (b), (c) and (d)

   ?

1 points ?

QUESTION 14

1. As the angle ? between two force vectors decreases continuously from 90? to 0?, the resultant R of the two vectors:

   	a.	increases at first, then decreases ??
   	b.	increases ?
   	c.	decreases ?
   	d.	decreases at first, then increases
   	e.	none of the above

1 points ?

QUESTION 15

1. If an object is in equilibrium, which of the following statements is not true?

   	a.	The speed of the object remains constant.
   	b.	The net force acting on the object is zero.
   	c.	The object must be at rest.
   	d.	The acceleration of the object is zero.
   	e.	There are at least two forces acting on the object

1 points ?

QUESTION 16

1. Two forces of ?magnitudes 11N and 5N respectively. Wich of the following could not be their resultant?

   a.

   7N?

   ?

   b.

   None of a ?b, c and d

   ?

   c.

   6N

   ?

   d.

   5N

   ?

   e.

   9N

   ?

1 points ?

QUESTION 17

1. A 20 kg machine pushes with ?a 200N force, a 30 kg box on a horizontal floor, without friction. What will be the acceleration of the box and machine?

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2 points ?

QUESTION 18

1. one half of the sum of the maximum and the minimum speeds is the average speed of an object undergoing:

   	a.	A uniformly accelerated or a uniformly decelerated motion
   	b.	A uniformly accelerated motion
   	c.	None of the above
   	d.	A uniform motion
   	e.	A uniformly decelerated motion

1 points ?

QUESTION 19

1. A storage tank in the yard of a house contains 1 kilolitre of water. Knowing that one litre is equivalent to one cubic-decimetre, the water quantity in the tank is:

   a.

   0.001 m3? ?

   ?

   b.

   None of (a), (b), (c) and (d)

   ?

   c.

   1 m3? ? ? ? ??

   ?

   d.

   1000 m3? ? ? ??

   ?

   e.

   ?1000000 m3? ??

   ?

1 points ?

QUESTION 20

1. The stroboscopic analysis of uniformly accelerated/decelerated motions is important because:

   	a.	Observations can be conducted at any moment of the actual course of the motion.? .
   	b.	none of a), b), c) and d).
   	c.	?All of a), b) and c). ? ? ? ? ? ? .
   	d.	Initial conditions for the analysis to be possible. ?
   	e.	It enables the implementation of a numerical approach in kinematics.?

1 points ?

QUESTION 21

1. A force can put an object into motion, can change or even stop the motion of an object, as well as a force can change the shape of a body?

   ?True? ??False