A man pulls a crate of mass 25 kg across the leveled ground with a horizontal force of 60 N. A constant force of friction of 20 N acts on the sledge. What is the acceleration of the sledge...?
(A) 0.63 ms^-2
(B) 1.6 ms^-2
(C) 2.4 ms^-2
(D) 3.2 ms^-2
✅ Correct Answer:1.6 ms^-2
Comments
A man pulls a crate of mass 25 kg across the leveled ground with a horizontal force of 60 N. A constant force of friction of 20 N acts on the sledge. What is the acceleration of the sledge...?
The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________...?
(A) 1120 ft
(B) 120 ft
(C) 56 ft
(D) 100 ft
✅ Correct Answer:56 ft
Comments
The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________...?
The radioactive isotopes are formed by neutrons bombardment on the nucleus, these incident neutrons must have ___ to penetrate in the nucleus....?
(A) Very high velocity
(B) Very low velocity
(C) Intermediate velocity
(D) All of these
✅ Correct Answer:Very high velocity
Comments
The radioactive isotopes are formed by neutrons bombardment on the nucleus, these incident neutrons must have ___ to penetrate in the nucleus....?
If the electrostatic force between two electrons is F Newton, then the electrostatic force between two protons at the same distance is _____...?
(A) F
(B) 0N
(C) 2F
(D) 2/3 F
✅ Correct Answer:F
Comments
If the electrostatic force between two electrons is F Newton, then the electrostatic force between two protons at the same distance is _____...?