Moving things around us - class-VII
Description: moving things around us | |
Number of Questions: 40 | |
Created by: Rachana Sahu | |
Tags: measurements and uncertainties motion, force and speed motion and measurement equations of motion force and motion motion motion, force and pressure motion and measurement of distances kinematics - describing motion physics motion in one dimension motion in a plane along with motion describing motion motion in a straight line motion and time mechanics kinematics primary concept of force and energy |
A ball lying on the ground does not move on its own because:
A tree in a park is in a state of _____with respect to the ground.
The earth is in a state of ______
A book lying on a table is an example of -
A book lying on a table is in a state of ____
Electric drill, rolling ball, wheel of a moving car, pendulum of a wall clock,spinning ball. Find the odd one out.
Apple falling from a tree, car moving on a straight road, coins moving over a carrom board, giant wheel. Find the odd one out:
Tree, hut, earth, dustbin, chair. Find the odd one out.
Select the odd one :
Two balls of different masses have the same KE. Then the:
When a body is at rest, it is obeying
An object is said to be in motion its position (with respect to another object)
What is corrct statement about impulse?
A train of length 200 m traveling at $30 { ms }^{ -1 }$ overtakes another train of length 300 m traveling at $20 { ms }^{ -1 }$. The time taken by the first train to pass the second is
A person in a car tends to fall back when it suddenly starts. It is due to
The wall of your classroom is in a state of -
If the forces acting on an object are balanced, then_____
If $\vec {u}=a \hat {i}+b \hat {j}+ c \hat {k}$ with $\hat {i},\hat {j},\hat {k}$ are in east, north and vertical directions, the maximum height of the projectile is ?
The pendulum of a wall clock exhibits
Symmetry of the laws of nature with respect to translation in time give rise to
A platform is moving in upward direction with uniform velocity 40 ${ ms }^{ -1 }$. When it reaches at a height of 100 m from the ground, a pocket is dropped from it. The total distance traveled by pocket during its free fall is (Take $g=10{ ms }^{ -2 }$)
What does the odometer of an automobile measure?
A laser signal sent towards the moon returns after t seconds.If c is speed of light, then the distance of the moon from the observer is
Distance is a vector quantity. State whether true or false.
Can a moving object cover zero distance?
Given 2x = 4, Where x is distance. Find the Value of X.
The distance of closest approach of an $\alpha $-particle projected towards a nucleus with momentum p is r. What will be the distance of closest approach, when the momentum of projected $\alpha $-particle is 2p?
The height $y$ and horizontal distance $x$ covered by a projectile in a time $t$ seconds are given by the equations $y = 8t - 5t^2$ and $x = 6t$. If $x$ and $y$ are measured in meters, the velocity of projection is:-
Estimate the force exerted by a $75 \ W$ bulb on your finger tip (are $1\ cm^{2}$), when is at a distance of $8 \ cm$ from the bulb. (Assume $100\%$ absorption)
A boy of mass $m$ is at one end of a flat boat of mass $M$ and length $l$ which floats stationary on water. If boy moves to the other end,
A stone is dropped under gravity from rest from a height h and it travels a distance $\frac { 9h }{ 25 } $ in the last second. What is the height 'h' ?
Four identical sphere each of radius $10 cm$ and mass $1 kg$ are plaed on a horizontal surface touching one another so that their centres are located at the corners of square of side $20 cm.$ What is the distance of their centre of mass from centre of either sphere$?$
The position of a particle moving along x-axis is given as $x = 3t^2 - t^3$ , in SI units. The distance travelled by the particle in $4$ seconds, is
A boy running at an average speed of $4 km hr^{-1}$ reaches school from his home in $\frac{1}{2}hr$. The distance of the school from his home is
If the displacement of an object is zero, the actual distance traversed by it will be :
Sunil and Rohit start at one end of a street, the origin and run to the other end, then head back. On the way back, Sunil is ahead of Rohit. Which statement is correct about the distances run and the displacements from the origin before reaching the origin?
A free falling body travels ___ of total distance in 5th second.
A particle experiences a constant acceleration for $6s$ after starting from rest. If it travels distance $x _{1}$ in the first two seconds and a distance $x _{2}$ in the next two next seconds and $x _{3}$in the next two seconds the n $x _{1}: x _{2}; x _{3}::1:3:5.$