1381. A solid cylinder and a hollow cylinder of same masses and radii are released from an inclined plane, then:
A. Solid cylinder will reach first to the ground *
B. Hollow cylinder will reach 1st to the ground
C. The two arrives at the ground simultaneously
D. None
1382. A body rotates with a constant angular momentum of 30J-S for 20 seconds . The force following up on the body is :
A. 1.5 N-m
B. 3 N- m
C. 0 N-m *
D. 10 N-m
1383. An object weighs 160N on earth surface . The same object will weight 40 N at an height from the earth surface of :
A. R/4
B. 2R
C. R/2
D. R *
1384. The time period of Geo-stationary satellite is :
A. 48 Hours
B. 24 Hours *
C. 12 Hours
D. 60 Hours
1385. The minimum number of satellite that can cover the whole face of the earth are :
A. 2
B. 3 *
C. 4
D. 5
1386. A spring balance read 100N body as 200 N . If mass of a body is 10kg . Then, at that point, the extent of speed increase is :
A. 8M/SEC2
B. 16M/SEC2
C. 10M/SEC2 *
D. 20M/SEC2
1387. A 100Kg mass attached to spring balance accelerate upward with 10m/s2. The spring balance reads the weight equal to :
A. 98N
B. 980N
C. 1980N *
d. -20N
1388. Two astronauts in a satellite orbiting around the earth in circular orbit must have :
A. Same masses
B. Same apparent weights *
C. Same real weights
D. Same height
1389. The apparent weight of mass 1kg falling freely is :
A. 1N
B. Zero *
C. 9.8N
D. 98N
1390. The S1 unit of viscosity is :
A. Poise
B. Pascal
C. Poiseuille
D. None of these *