Phy 111 - Elementary Mechanics
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- 1.Assuming that the Earth is a uniform sphere of radius 6.4 x 106 m and mass 6.0 x 1024 kg, find the gravitational field strength g at a point on the surface of the earth
- A.
19.77ms-2
- B.
199.10ms-2
- C.
9.77ms-2
- D.
100.7ms-2
- 2.Assuming that the Earth is a uniform sphere of radius 6.4 x 106 m and mass 6.0 x 1024 kg, find the gravitational field strength g at a point: at height 0.50 times the radius of above the Earth's surface
- A.
14.314ms-2
- B.
24.134ms-2
- C.
10.314ms-2
- D.
4.34ms-2
- 3.What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth
- A.
gR^2/(R+h)2(gR2)/(R+h)2
- B.
GR/(R+h)2
- C.
GR/(R+h^2)2
- D.
GR/(R^2+h)2
- 4.The instrument used for experimental determination of the value of the universal gravitational constant G is
- A.
Galilio’s telescope
- B.
Ballistic pendulum
- C.
Newton’s balance
- D.
Cavendish balance
- 5.A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is not true?
- A.
The passer-by is stationery relative to the passenger
- B.
Both observers are in motion relative to each other
- C.
The passenger is in motion relative to the passer-by
- D.
The passer-by is in motion relative to the passenger
- 6.Which of the following statements is not correct about reference frames?
- A.
Any reference frame moving at constant velocity with respect to an inerial refernce frame is also inertial
- B.
In non-inertial reference frames the motion of objects depend only on the interactions of constituent particles among themselves
- C.
If the coordinate axes of a reference frame attached to an object remain fixed in space then the object is at rest
- D.
Laws of physics are invariant in inertial reference frames
- 7.What are the dimensions of power (time rate of change of expending energy)
- A.
MLT−2
- B.
ML2T−3
- C.
ML2T−2
- D.
M2L2T−3
- 8.Two forces act on a point object as follows: 100N at 170derees and 100N at 50degrees. Find their resultant force
- A.
100 N at 110o
- B.
110 N at 50o
- C.
110 N at 100o
- D.
100 N at 50o
- 9.The speed of 90 hm/hr is equal to ------------------ m/s
- A.
324
- B.
90
- C.
15
- D.
25
- 10.Type question here
- A.
Answer option 1
- B.
Answer option 2
- C.
Answer option 3
- D.
Answer option 4
- 11.Identify the instrument above, which always spin continuously when torqued?
- A.
Horoscope
- B.
Stetoscope
- C.
Gyroscope
- D.
Spinoscope
- 12.A monkey in a perch 20m high in a tree drops a coconut above the head of a zoo keeper as he runs with a speed 1.5m/s beneath the tree. How far behind him in metres does the coconut hit the ground?
- A.
3.03
- B.
2.25
- C.
3.06
- D.
2.02
- 13.A monkey in a perch 20 m high in a tree drops a coconut above the head of a zoo keeper as he runs with a speed 1.5 m/s beneath the tree actually intending to hit the toes of the zoo keeper, how early in seconds should the coconut be dropped by the monkey
- A.
1.35
- B.
1.50
- C.
2.04
- D.
3.02
- 14.Which one do you like?
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
Questions: 10 | Attempts: 6659 | Last updated: Nov 19, 2020
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