physics

A force acting on a body causes a change in the momentum of a body from 12 kg ms‾¹ to 16kg ms‾¹ in 0.25. Calculate the magnitude of the impulse.

A. 28.0Ns B. 20.0Ns C. 4.0Ns D. 0.8Ns Correct Answer: Option C C. 4.0Ns Explanation Ft = I = MY…

6 years ago

Which of the following statements about simple harmonic motion is correct? The

A. total mechanical energy is always conserved B. linear acceleration is directed to any variable point C. linear acceleration varies…

6 years ago

Which of the following quantities is a vector?

A. speed B. distance C. energy D. momentum Correct Answer: Option D D. momentum

6 years ago

A car accelerates uniformly from rest at 5 ms‾². Determine its speed after 10s.

A. 50.0 ms‾² B. 25.0 ms‾² C. 2.0 ms‾² D. 0.5 ms‾² Correct Answer: Option A A. 50.0 ms‾² Explanation…

6 years ago

Uniform speed occurs when there is equal change of?

A. distance in equal times B. displacement in equal times C. velocity in equal times D. acceleration in equal times…

6 years ago

A moving car of mass 800 kg experiences a frictional force of 200N. If it accelerates 2 ms‾², calculate the magnitude of the force applied to the car.

A. 600N B. 1000N ms‾² C. 1600N D. 1800N Correct Answer: Option D D. 1800N Explanation F = M +…

6 years ago

A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rads‾¹. Calculate the magnitude of the radial acceleration of the body.

A. 62.50ms‾² B. 31.25ms‾² C. 12.50ms‾² D. 10.00ms‾² Correct Answer: Option C C. 12.50ms‾²

6 years ago

An object is said to undergo oscillatory motion when it moves?

A. in an erratic manner B. to and fro about a fixed point C. in a circular path D. along…

6 years ago

A solid body will float in a liquid if its?

A. density is less than that of a liquid B. mass is equal to that of the liquid C. density…

6 years ago

Which of the following physical quantities are derived?

i. Area ii. Thrust iii. Pressure iv. Mass A. i, ii, iii and iv B. i, ii and iii only…

6 years ago