choice queStioNS
1.
Which one of the following is NOT a correct unit for work?
a. Joule b. Newton-meter c. ft.lb d. watt
2.
A boy holds a 40-N weight at arm’s length for 10 s. His arm is 1.5 m above
the ground. The work done by the force of the boy on the weight while he is
holding it is:
a. 0 b. 40J c. 6.1J d. 60J
3.
The work done by gravity during the descent of a projectile is:
a. Positive c. Negative d. zero
b. Depends for its sign of both x and y axes
4.
A 2-kg object is moving at 3 m/s. A 4-N force is applied in the direction of
motion and then removed after the object has traveled an additional 5 m. The
work done by this force is:
a. 12 J b. 15 J c. 18 J d. 20 J
5.
A 1-kg block is lifted vertically 1 m by a boy. The work done by the boy is:
a. Zero b. 1 J c. 10 J d. 1ft.lb
6.
Which of the following is the correct combination of dimensions for energy?
a. MLT
b. ଶ⁄
c. ଶ ଶ ⁄
d. ଶ
ିଵ
7.
A watt is:
a. . ଶ⁄ b. . ଶ ଶ ⁄ c. . ଶ ଷ ⁄ d. .
ଷ ⁄
8.
Power has the dimensions of:
a. ଶ ଶ ⁄ b. ଶ ଷ ⁄ c.
ଶ
⁄
d. ଶ ଷ ⁄
9.
A watt-second is a unit of :
a. Force b. Power c. Speed d. Energy
10. A watt per hour is a unit of :
a. Power b. Work c. Force d. None of them
11. A kilowatt-hour is a unit of :
a. Power b. Work c. Power / time d. Energy / time
Answers
Answered by
0
Answer:
sorry but I don't know
mene physics nahi li h but aap Google par question likho aapko ans mil jayenge
Answered by
0
Answer:
1-a
2-b
3-d
4-a
5-b
6-a
7-b
8-c
9-a
10-b
11-c
Similar questions