Laws of Motion (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 24  27 of 116
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Question number: 24
» Laws of Motion » Force and Inertia
Question
A car is moving in a circular path of radius 50 m with velocity of 100 m/sec such that in each sec its velocity increases by 100 m/s, the net acceleration of car will be  (in m/sec)
Choices
Choice (4)  Response  

a.  300.10 

b.  10.70 

c.  100.20 

d.  223.60 

Question number: 25
» Laws of Motion » Force and Inertia
Question
An aircraft loops the loop of radius R = 600 m with a constant velocity v = 360 km/h. The weight of the flyer of mass m = 60 kg in the lower, upper and middle points of the loop will respectively be
Choices
Choice (4)  Response  

a.  210 N, 700 N, 1400 N 

b.  1600 N, 400 N, 1000 N 

c.  700 N, 1400 N, 210 N 

d.  2100 N, 700 N, 1400 N 

Question number: 26
» Laws of Motion » Force and Inertia
Question
A swimmer can swim in still water at a rate 4 km/h. If he swims in a river flowing at 3 km/h and keeps his direction (w. r. t. water) perpendicular to the current. Find his velocity w. r. t. the ground.
Choices
Choice (4)  Response  

a.  11.40 km/hr 

b.  15.05 km/hr 

c.  30.20 km/hr 

d.  17 km/hr 

Question number: 27
» Laws of Motion » Force and Inertia
Question
A cricket ball of mass 250 gm moving with a velocity of 25 m/s is hit by a bat so that it acquires a velocity of 30 m/s in the opposite direction. The force acting on the ball, if the contact time is 1/100 of a second, will be 
Choices
Choice (4)  Response  

a.  632.5 N in the initial direction of ball 

b.  1300 N in the final direction of ball 

c.  1.345 N in the initial direction of ball 

d.  130 N in the final direction of ball 
