K R Prajwal
Q.1 A particle is moving in a straight line with initial velocity u and retardation αv, where v is the velocity at any time t
[a] the particle will cover a total distance u/α
[b] the particle will come to rest after 1/α
[c] the particle will continue to move for a very long time
[d] the velocity of the particle will become u/2 after time 1/α
Q.2 A particle moves along the xaxis as x = u(t-1)2 + a(t-3)3
[a] initial velocity of the particle is u
[b] the acceleration of the particle is a
[c] the acceleration of the particle is 2a
[d] the particle is at the origin at time t=3 seconds
Q.3 A particle is projected vertically upwards
[a] the speed decreases uniformly with distance
[b] the speed decreases uniformly with time
[c] the KE decrease uniformly with time
[d] KE decreases uniformly with distance
Q.4 If an observer moves at constant speed along the line joining two stationary objects> he will the two objects
[a] have the same velocity
[b] have the same speed
[c] move in opposite directions
[d] move in the same direction.
Q.5 A particle is moving with uniform acceleration along a straight line AB. Its speed at A and B are 2m/s and 14m/s respectively. Then
[a] its speed at the midpoint is 10m/s
[b] its speed at point P such that AP:PB is 1:5 is 4m/s
[c] the time to go from A to mid point of AB is double to move from mid point to B
[d] none of the above.
Q.6 A body starting from rest is moving with uniform acceleration of 5m/s2 for time 10s, and after that with uniform acceleration of 10m/s2 for 15s, then
[a] average acceleration of the body is 7.5m/s2
[b] the average acceleration is 8m/s2
[c] total distance covered is 1875m
[d] total distance covered is 2125m
Q.7 A particle moves first 10m in 2s and 20m in the next 3s and 30m in next
[a] the particle will cover a total distance u/α
[b] the particle will come to rest after 1/α
[c] the particle will continue to move for a very long time
[d] the velocity of the particle will become u/2 after time 1/α
Q.2 A particle moves along the xaxis as x = u(t-1)2 + a(t-3)3
[a] initial velocity of the particle is u
[b] the acceleration of the particle is a
[c] the acceleration of the particle is 2a
[d] the particle is at the origin at time t=3 seconds
Q.3 A particle is projected vertically upwards
[a] the speed decreases uniformly with distance
[b] the speed decreases uniformly with time
[c] the KE decrease uniformly with time
[d] KE decreases uniformly with distance
Q.4 If an observer moves at constant speed along the line joining two stationary objects> he will the two objects
[a] have the same velocity
[b] have the same speed
[c] move in opposite directions
[d] move in the same direction.
Q.5 A particle is moving with uniform acceleration along a straight line AB. Its speed at A and B are 2m/s and 14m/s respectively. Then
[a] its speed at the midpoint is 10m/s
[b] its speed at point P such that AP:PB is 1:5 is 4m/s
[c] the time to go from A to mid point of AB is double to move from mid point to B
[d] none of the above.
Q.6 A body starting from rest is moving with uniform acceleration of 5m/s2 for time 10s, and after that with uniform acceleration of 10m/s2 for 15s, then
[a] average acceleration of the body is 7.5m/s2
[b] the average acceleration is 8m/s2
[c] total distance covered is 1875m
[d] total distance covered is 2125m
Q.7 A particle moves first 10m in 2s and 20m in the next 3s and 30m in next