O (S): A 50-N force is the only force on a 2-kg object that starts from rest. When the force has been acting for 2 m the rate at which it is doing work is: ) 2.5 W b) 25 W e) 75 W d) 100 W e) 500 w

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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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plz, physics , please solve question 5

A ray is incident on miror Mt at an angle of (0,75") to the normal.
Q (6): A car starts its motion from rest and travels a 150 m in 15 s while moving along a straight line
O (4): Two mimors make an angle of 120° with each other as illustrated in Figre.
O (5): A 50-N force is the only force on a 2-kg object that starts from rest. When the force has been
Q (7): A sphere of mass m slides on a frictionless path ABC. If the sphere starts from rest at point B,
Find the direction of the ray after it is reflected from mirror Ma
b) 25
e) 35
d) 55
a) 65
e) 45°
acting for 2 m the rate at which it is doing work is:
b) 25 W
c) 75 W
d) 100 W
e) 500 W
a) 2.5 W
with constant acceleration. The final speed in (m/s) of this car is:
a) 20
b) 30
e) 15
d) 12
e) 25
the speed of the sphere (in m/s) at point B is:
30 m
15
a) 28
b) 38
c) 17.2
d) 24.2
e) 19.8
O (8): If a 3 kg ball is thrown straight up into the air with initial speed of 25 m/s, the kinetie p
(in J) of the ball at maximum height is:
a) 12.5
b) 25
c) Zero
d) 50
e) 2
O (9): A quantity of gas has a volume of 250 L at 17 C° and 3 atm of pressure. To what volume
must the gas be increased for the gas to be under STP condition?
a) 78.4 L b) 706 L
c) 88.5 L
d) 771 L
e) 797 L
Q (10): The coefficient of linear expansion of steel is 11 x 106C0. A steel ball has a volume of
exactly 100 cm' at 0 C. When heated to 100 Co, its volume becomes:
a) 100.33 cm
b) 100.0011 cm
c) 100.0033 cm
d) 100.000011 cm
Transcribed Image Text:A ray is incident on miror Mt at an angle of (0,75") to the normal. Q (6): A car starts its motion from rest and travels a 150 m in 15 s while moving along a straight line O (4): Two mimors make an angle of 120° with each other as illustrated in Figre. O (5): A 50-N force is the only force on a 2-kg object that starts from rest. When the force has been Q (7): A sphere of mass m slides on a frictionless path ABC. If the sphere starts from rest at point B, Find the direction of the ray after it is reflected from mirror Ma b) 25 e) 35 d) 55 a) 65 e) 45° acting for 2 m the rate at which it is doing work is: b) 25 W c) 75 W d) 100 W e) 500 W a) 2.5 W with constant acceleration. The final speed in (m/s) of this car is: a) 20 b) 30 e) 15 d) 12 e) 25 the speed of the sphere (in m/s) at point B is: 30 m 15 a) 28 b) 38 c) 17.2 d) 24.2 e) 19.8 O (8): If a 3 kg ball is thrown straight up into the air with initial speed of 25 m/s, the kinetie p (in J) of the ball at maximum height is: a) 12.5 b) 25 c) Zero d) 50 e) 2 O (9): A quantity of gas has a volume of 250 L at 17 C° and 3 atm of pressure. To what volume must the gas be increased for the gas to be under STP condition? a) 78.4 L b) 706 L c) 88.5 L d) 771 L e) 797 L Q (10): The coefficient of linear expansion of steel is 11 x 106C0. A steel ball has a volume of exactly 100 cm' at 0 C. When heated to 100 Co, its volume becomes: a) 100.33 cm b) 100.0011 cm c) 100.0033 cm d) 100.000011 cm
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