physics

The angle at which a projectile must be fired to cover maximum range is?

A. 30° B. 45° C. 60° D. 90° Correct Answer: Option B B. 45° Explanation The formula is v²sin²θ/g And…

6 years ago

A motorist travelling at 72kmh‾¹ had his eyes shut for 0.4s during a hard sneeze. Calculate the distance covered by him during this time interval.

A. 50.0m B. 28.8m C. 18.0m D. 8.0m Correct Answer: Option D D. 8.0m Explanation Convert velocity from kmh‾¹ to…

6 years ago

A chemical balance is used for measuring?

A. volume B. mass C. thickness D. density Correct Answer: Option B B. mass Explanation It is a type of…

6 years ago

Which of the following processes is not a surface phenomenon?

A. Condensation B. Evaporation C. Photo Emission D. Thermionic Emission Correct Answer: Option A A. Condensation

6 years ago

A body weighing 14N in air is partially immersed in water. If the mass of water displaced in the process is 200g, calculate the upthrust on the body. [g=10m/s2]

A. 2.0N B. 3.0N C. 3.5N D. 7.0N Correct Answer: Option A A. 2.0N Explanation Upthrust = weight of the…

6 years ago

A ball is projected horizontally from the top of a tower. Neglecting air resistance, which of the following statements about its motion is/are correct?

I. Vertical acceleration on the ball decreases as it falls II. The vertical force on the ball remains constant III.…

6 years ago

Which of the following statements about matter is not correct?

A. Molecules of solids move more freely than molecules of liquids and gases B. Molecules of solids are more closely…

6 years ago

A body accelerates uniformly from rest at 2ms−2. Calculate its velocity when it has travelled a distance of 9m.

A. 3.0ms−1 B. 4.5ms−1 C. 6.0ms−1 D. 18.0ms−1 Correct Answer: Option C C. 6.0ms−1 Explanation Given that u=0ms−1,a=2ms‾², s=9m We…

6 years ago

Which of the following is the dimension for impulse?

A. MLT‾¹ B. MLT‾² C. MLT D. ML Correct Answer: Option A A. MLT‾¹ Explanation Impulse = Force × time…

6 years ago