1 |
Bodies failing freely under gravity provide good example of motion under |
non-uniform acceleration
uniform acceleration
variable acceleration
increasing acceleration
|
2 |
The decrease in velocity per unit time is called |
deceleration
acceleration
uniform acceleration
variable acceleration
|
3 |
A body moving with uniform velocity has |
positive acceleration
negative acceleration
infinite acceleration
zero acceleration
|
4 |
If the values of instantaneous and average velocities are equal, the body is said to be moving with |
uniform acceleration
uniform speed
variable velocity
uniform velocity
|
5 |
Acceleration of a body is negative if the velocity of the body is |
constant
increasing
decreasing
none of them
|
6 |
Acceleration of a body is positive, if the velocity of the body is |
constant
increasing
decreasing
none of them
|
7 |
Acceleration of a body at any particular instant during its motion is known as |
average acceleration
uniform acceleration
instantaneous acceleration
all of them
|
8 |
The direction of the acceleration is the same as that of |
speed
velocity
both of them
none of them
|
9 |
Velocity of a body changes if |
direction of the body changes
speed of the body changes
neither speed nor direction changes
either speed or direction changes
|
10 |
If the instantaneous velocity of a body does not change. the body is said to be moving with |
average velocity
uniform velocity
instantaneous velocity
variable velocity
|
11 |
The instantaneous velocity is define as the limiting value of Δd/Δt on the time intervalΔt approaches to |
zero
maximum
minimum
infinity
|
12 |
The velocity of a body at any instant of its motion is known as |
average velocity
instantaneous velocity
uniform velocity
none of them
|
13 |
If a ball comes back to its starting point after bouncing off the wall several times, then its |
total displacement is zero
average velocity is zero
none of them
both of them
|
14 |
When we consider the average velocity of a body, then the body is moving in |
straight line
curved path
may be in a straight or curved path
none of them
|
15 |
If d is the displacement of the body in time t, then its average velocity will be |
<b>V</b><sub>av</sub>= <b>d</b> x t
<b>V</b><sub>av = t/<b>d</b></sub>
<b>V</b><sub>av = d/t</sub>
<b>V</b><sub>av = <b>d</b>/t</sub>
|