Phy 111 - Elementary Mechanics

14 Questions | By Timetconcepts | Last updated: Mar 21, 2022 | Total Attempts: 416

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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