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- Question
When a constant force acts on an object with a mass of 8 kg for a duration of 3 s. it increases the object's velocity from 4 m/s to 6 m/s . What is the magnitude of the applied force?
Options- A. 5.33 N
- B. 4.33 N
- C. 6.33 N
- D. 3.33 N
- Correct Answer
- 5.33 N
- 1. Bending of light rays in denser medium is termed as:
Options- A. Reflection
- B. Dispersion
- C. Refraction
- D. Deflection Discuss
- 2. A car accelerates uniformly from 18 kmph to 72 kmph in 5 s. The acceleration of the car (in m/sq.s) is:
Options- A. 3
- B. 5
- C. 6
- D. 7 Discuss
- 3. A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/sq.s)
Options- A. 0J
- B. 200J
- C. 400J
- D. 100J Discuss
- 4. The focal length of a concave mirror with a radius of curvature of 20.0 cm is :
Options- A. 20 cm
- B. 5 cm
- C. 10 cm
- D. 15 cm Discuss
- 5. If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:
Options- A. concave mirror
- B. convex mirror
- C. plano-concave mirror
- D. plane mirror Discuss
- 6. An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is
Options- A. 20 J
- B. 25 J
- C. 10 J
- D. 40 J Discuss
- 7. An object having the capability to do work is said to possess
Options- A. Inertia
- B. Force
- C. Pressure
- D. Energy Discuss
- 8. 1kWH = .........J
Options- A. 3.6×10^-8
- B. 3.6×10^-6
- C. 3.6×10^8
- D. 3.6×10^6 Discuss
- 9. Optical fiber works on the principle of -
Options- A. Diffusion
- B. Total Internal Reflection
- C. Scattering
- D. Refraction Discuss
- 10. A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?
Options- A. The liquid surface falls down on the direction of motion and rises up on the back side of the tank
- B. The liquid surface falls down only at the center of the tank
- C. The surface of the liquid remains horizontal
- D. None Discuss
Physics problems
Search Results
Correct Answer: Refraction
Correct Answer: 3
Correct Answer: 0J
Correct Answer: 10 cm
Correct Answer: convex mirror
Correct Answer: 20 J
Correct Answer: Energy
Correct Answer: 3.6×10^6
Correct Answer: Total Internal Reflection
Correct Answer: The liquid surface falls down on the direction of motion and rises up on the back side of the tank
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