Test Series-6

### Instructions

• Your test contains 10 multiple choice questions with only one answer
• This is 15 min test.Please make sure you complete it in stipulated time
• You can Finish this test any time using 'Submit' button.
• Once finished you get a chance to review all question with correct answers .

1.Average speed is defined as the distance travelled divided by time taken
• True
• False

2.Instantanous acceleration is defined as
• dx/dt
• d2x/dt2
• Δx/Δt
• None of these

3.Average velocity in a round trip is zero
• True
• false

4.A body is thrown upwards with certain velocity.Which of the following is Incorrect
• The body will experience retardation
• The body velocity will become zero at the peak point
• The time taken to reach the peak point is u/g
• None of these

5.Mark the wrong statement
• Magnitude of displacement is always equal to distance travelled
• Area under velocity versus time graph with proper alegebric sign gives the displacement
• Speed can not be negative
• If velocity is constant,speed will be constant

STATEMENT 1: Average speed is not equal to the magnitude of average velocity in general
STATEMENT 2: Average velocity is a scalar while average speed is a vector quantity
• Both the statement are correct
• Statement A is correct only
• Statement B is correct only
• A and B both are wrong

7.Which of following statement is Incorrect
• Acceleration is said to be constant when both direction and magnitude are constant
• A body may have zero instantatnous velocity but finite acceleration
• Instantanous velocity is defined as limΔt->0 Δr/Δt
• None of these

8.Four statement are made for acceleration
STATEMENT -1: Accerleration is a vector quantity
STATEMENT -2: The slope of the velocity time graph gives the accleration
STATEMENT -3: Its direction is same as the change in velocity
STATEMENT -4: a=vdv/dx
which one of the following is correct
• All the statement are correct
• Statement 1,2 and 4 are correct
• Statement 1,2 and 3 are correct
• Statement 2,3 and 4 are correct

9.Which of the following option is correct
• Mean Velocity= (vf + vi )/2
• Average acceleration =(v2 + v1 )/(t2 -t1)
• Displacement in a motion in a staright with uniform acceleration is given by s=u + (1/2)at2None of these

10.Match the column
 Column I Column II P) Speed L) MLT-2 Q)velocity M)MLT-1 R) Acceleration N)MLT0 S)Displacement O) MLT2
• P->M,Q->L,R->L,S->L
• P->M,Q->M,R->L,S->N
• P->M,Q->M,R->L,S->O
• P->M,Q->N,R->M,S->O

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