A body is moving with initial velocity 30 m/s. After certain time it acquires velocity of 40 m/s, then the velocity in middle of its journey is
A) 25√2
B) 50
C) 25
D) \(\cfrac{\sqrt{50}}2\)
1 Answers
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A man travels half time of its journey with speed of 5m/s and for remaining half time he moves half of its total distance travelled, with speed of 3 m
Correct Answer - 4.5 m/s
2 Answers 1 views
A body is dropped from the top of a tower and it covers a 80 m distance in last two seconds of its journey. Find out `[g=10 ms^(-2)]` (i) height of th
Correct Answer - (i) 125 m (ii) 5 sec (iii) `50 m//s`
2 Answers 3 views
A body of mass 2 kg moving on a horizontal surface with initial velocity of 4 m s^-1 comes to rest after two seconds.
Correct Option is : (A) 4 N We know that , v = u + at \(0 = 4 + a \times 2\) \(a = \frac{-4}{2}\) \(a = -2 m/s^2\) \(Force , \ F = ma\) \(F = 2...
2 Answers 1 views
A body of mass 2 kg moving on a horizontal surface with initial velocity of 4 m s^-1 comes to rest after two seconds.
2 Answers
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A body released from height ‘h’ takes time’t’ to reach the ground. After time t/2, its height from the ground is
C) \(\cfrac{3h}4\)
2 Answers 1 views
A force of IN acts on a body of mass 5kg. The body covers 100 cm in 2 seconds moving along a straight line. The initial velocity is
D) 120 cm/sec
2 Answers 1 views
Time period of a body moving around a body of radius R, with velocity v is …………
A) T = \(\cfrac{2πR}v\)
2 Answers 1 views
When the speed of the body moving in a straight line changes continuously then the body acquires
Correct option is A) Acceleration
2 Answers 1 views
An aeroplane takes 1 hour less for a journey of 1200 km if its speed is increased by 100 km/hr from its usual speed. Find its usual speed.
Let usual speed of aeroplane be x km/hr. Given, distance =1200 km Time taken for journey of 1200 km `=(1200)/(x) "hours"" "(because "Time"="Distance"/"Speed")` When the speed is increased by 100...
2 Answers 1 views
A body of mass `2kg` moving on a horizantal surface with an initial velocity of comes to rest after `2` second. If one wants to keep this body moving
Correct Answer - C `v=u+at,F=ma`
2 Answers 1 views