Motion Worksheet-6
A. always less than 1 B. equal to 1 or more than 1
C. always more than 1 D. equal to 1 or less than 1
A. at rest
B. moving with no acceleration
C. in accelerated motion
D. moving with uniform velocity
A. if the car is moving on straight road
B. if the car is moving on circular road
C. if the pendulum is moving to and fro
D. if a planet is moving around the sun
A. 2.16 km/h B. 1.08 km/h
C. 0.216 km/h D. 0.0216 km/h
A. uniform motion B. uniform acceleration
C. no acceleration D. Uniform velocity
A. the car has a inform acceleration
B. The direction of car varies continuously
C. the car travels unequal distances un equal time intervals
D. the car travels equal distances in unequal time intervals
A. velocity of a moving body is always higher than its speed
B. speed of a moving body is always higher than its velocity
C. Speed of a moving body is its velocity in a given direction
D. Velocity of a moving body is its speed in a given direction
(i) average velocity (ii) distance travelled (iii) average speed (iv) displacement
A. only (i) B. (i) and (ii)
C. (i) and (iv) D. only (iv)
A. +2 m/s^{2} B. –2 m/s^{2} C. –0.5 m/s^{2} D. +0.5 m/s^{2}
A. km/h B. s/m C. m/s D. m s^{–1}
Answer:
Explanation: If the person is moving in one direction along a straight line the distance travelled and displacement will be same. Distance and displacement will be same if person is travelling from A to B
But if the person is moving from C to D the distance travelled will be more than displacement. Distance travelled is the length of curved line from C to D and displacement is the straight distance between C to D. So the ratio wil be either 1 or less than 1.
Explanation: When a body walks across a straigh line distance travelled and magnitude of displacement will be same. In case of to and fro movement of pendulam displacement will be zero since the distance between the initial positiona dn final position is zero. In other cases distance will be more than displacement.
Explanation: 0.06 m/s
1 km = 1000 m and 1 hour = 60 × 60 seconds
So speed will be 0.06 × 60 × 60/1000 kmph
Explanation: Velocity is a vector quantity and it depends upon the direction of the movement of the body.
Explanation: For example, if the body is moving in a circular path then after one complete round the difference between initial point and final point will be zero hence displacement will be zero and when displacement is zero velocity will also be zero as velocity is displacement/time
Explanation: a = (V – u)/t here ‘v’ is the final velocity, ‘u’ is the initial velocity and ‘t’ is the time taken,
by puttiong the value a = ( 0 – 10)/20 = - 0.5 (negative sign shows retardation) But in the question we are asked retardation only that means it will be 0.5 m/s^{2}