Motion: Velocity and Speed
CBSE TEST PAPER-02 CLASS - IX Science (Motion)
1.
If a body starts from rest, what can be said about the acceleration of body? (a) Positively accelerated (c) Uniform accelerated (b) Negative accelerated (d) None of the above
[1]
2.
What does slope of position time graph give? (a) speed (b) acceleration (c) uniform speed
[1]
(d) Both (a) and (c) depending upon the type of graph. 3. When a body moves uniformly along the circle, then:(a) its velocity changes but speed remains the same (b) its speed changes but velocity remains the same (c) both speed and velocity changes (d) both speed and velocity remains same 4. Which of the following statements is correct? (a) speed distance are scalar, velocity and displacement are vector (b) speed distance are vector, velocity and displacement are vector (c) speed and velocity are scalar, distance and velocity are vector (d) speed and velocity are vector, distance and displacement are scalar 5. A car travels at a speed of 40km/hr for two hour and then at 60km/hr for three hours. What is the average speed of the car during the entire journey? 6. The velocity time graph of two bodies A and B traveling along the +x direction are given in the figure (a) Are the bodies moving with uniform acceleration? (b) Which body is moving with greater acceleration A or B? 7. Derive the second equation of motion, s = ut +
1 2 at numerically? 2
[1]
[1]
[2]
[2]
[2]
8.
Calculate the acceleration and distance of the body moving with 5m/s2 which comes to rest after traveling for 6sec?
[2]
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9.
A body is dropped from a height of 320m. The acceleration due to the gravity is 10m/s2? (a) How long does it take to reach the ground? (b) What is the velocity with which it will strike the ground?
[3]
10. 11.
Derive third equation of motion v 2 − u 2 = 2as numerically? The velocity time graph of
1.
If a body starts from rest, what can be said about the acceleration of body? (a) Positively accelerated (c) Uniform accelerated (b) Negative accelerated (d) None of the above
[1]
2.
What does slope of position time graph give? (a) speed (b) acceleration (c) uniform speed
[1]
(d) Both (a) and (c) depending upon the type of graph. 3. When a body moves uniformly along the circle, then:(a) its velocity changes but speed remains the same (b) its speed changes but velocity remains the same (c) both speed and velocity changes (d) both speed and velocity remains same 4. Which of the following statements is correct? (a) speed distance are scalar, velocity and displacement are vector (b) speed distance are vector, velocity and displacement are vector (c) speed and velocity are scalar, distance and velocity are vector (d) speed and velocity are vector, distance and displacement are scalar 5. A car travels at a speed of 40km/hr for two hour and then at 60km/hr for three hours. What is the average speed of the car during the entire journey? 6. The velocity time graph of two bodies A and B traveling along the +x direction are given in the figure (a) Are the bodies moving with uniform acceleration? (b) Which body is moving with greater acceleration A or B? 7. Derive the second equation of motion, s = ut +
1 2 at numerically? 2
[1]
[1]
[2]
[2]
[2]
8.
Calculate the acceleration and distance of the body moving with 5m/s2 which comes to rest after traveling for 6sec?
[2]
Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
9.
A body is dropped from a height of 320m. The acceleration due to the gravity is 10m/s2? (a) How long does it take to reach the ground? (b) What is the velocity with which it will strike the ground?
[3]
10. 11.
Derive third equation of motion v 2 − u 2 = 2as numerically? The velocity time graph of