Physics-
General
Easy
Question
A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is
- Equal to the time of fall
- Less than the time of fall
- Greater than the time of fall
- Twice the time of fall
The correct answer is: Less than the time of fall
Let the initial velocity of ball be
Time of rise and height reached
Time of fall is given by
because
Related Questions to study
Physics-
A body is travelling in a straight line with a uniformly increasing speed. Which one of the plot represents the change in distance travelled with time
A body is travelling in a straight line with a uniformly increasing speed. Which one of the plot represents the change in distance travelled with time
Physics-General
Physics-
From the top of a tower two stones, whose masses are in the ratio are thrown one straight up with an initial speed and the second straight down with the same speed . Then, neglecting air resistance
From the top of a tower two stones, whose masses are in the ratio are thrown one straight up with an initial speed and the second straight down with the same speed . Then, neglecting air resistance
Physics-General
Physics-
A cannon of a level plane is aimed at an angle above the horizontal and a shell is fired muzzle velocity towards a cliff distance away. The height at which the canon strikes the cliff is given by
A cannon of a level plane is aimed at an angle above the horizontal and a shell is fired muzzle velocity towards a cliff distance away. The height at which the canon strikes the cliff is given by
Physics-General
Physics-
Two bodies are projected with the same velocity. If one is projected at an angle of and the other at an angle of to the horizontal, the ratio of the maximum heights reached is
Two bodies are projected with the same velocity. If one is projected at an angle of and the other at an angle of to the horizontal, the ratio of the maximum heights reached is
Physics-General
Physics-
Two inclined planes are located as shown in figure. A particle is projected from the foot of one frictionless plane along its line with a velocity just sufficient to carry it to top after which the particle slides down the other frictionless inclined plane. The total time it will take to reach the point is
Two inclined planes are located as shown in figure. A particle is projected from the foot of one frictionless plane along its line with a velocity just sufficient to carry it to top after which the particle slides down the other frictionless inclined plane. The total time it will take to reach the point isPhysics-General
Physics-General
Physics-
There are two forces each of magnitude 10 units. One inclined at an angle of 30 and the other at an angle of 135 to the positive direction of axis. The and components of the resultant are respectively.
There are two forces each of magnitude 10 units. One inclined at an angle of 30 and the other at an angle of 135 to the positive direction of axis. The and components of the resultant are respectively.
Physics-General
Physics-
If = and , then angle between and is
If = and , then angle between and is
Physics-General
Physics-
A body is projected with initial velocity of . The horizontal range is
A body is projected with initial velocity of . The horizontal range is
Physics-General
Physics-
A wheel completes 2000 revolutions to cover the 9.5 km distance, then the diameter of the wheel is
A wheel completes 2000 revolutions to cover the 9.5 km distance, then the diameter of the wheel is
Physics-General
Physics-
When a ceiling fan is switched on, it makes 10 rotations in the first 4 s. How many rotations will it make in the next 4 s? (Assuming uniform angular acceleration)
When a ceiling fan is switched on, it makes 10 rotations in the first 4 s. How many rotations will it make in the next 4 s? (Assuming uniform angular acceleration)
Physics-General
Physics-
A car runs at a constant speed on a circular track of radius 100 m, taking 62.8 s for every circular lap. The average velocity and average speed for each circular lap is
A car runs at a constant speed on a circular track of radius 100 m, taking 62.8 s for every circular lap. The average velocity and average speed for each circular lap is
Physics-General
Physics-
() is a unit vector along -axis. If then what value is
() is a unit vector along -axis. If then what value is
Physics-General
Physics-
A projectile is fired at an angle of with the horizontal. Elevation angle of the projectile at its highest point as seen from the point of projection, is:
A projectile is fired at an angle of with the horizontal. Elevation angle of the projectile at its highest point as seen from the point of projection, is:
Physics-General
Physics-
A ball is projected with kinetic energy at an angle of to the horizontal. At the highest point during its flight, its kinetic energy will be
A ball is projected with kinetic energy at an angle of to the horizontal. At the highest point during its flight, its kinetic energy will be
Physics-General
Physics-
In uniform circular motion, the velocity vector and acceleration vector are
In uniform circular motion, the velocity vector and acceleration vector are
Physics-General