Assertion`:-` A ball is thrown from the edge of a very high clif. No matter what the angle at which it is thrown , due to air resistance, the ball will eventually end up moving vertically downward.
Reason `:-` In horizontal direction there is a component of retarding force of air resistance alone.
Assertion`:-` A ball is thrown from the edge of a very high clif. No matter what the angle at which it is thrown , due to air resistance, the ball will eventually end up moving vertically downward.
Reason `:-` In horizontal direction there is a component of retarding force of air resistance alone.
Reason `:-` In horizontal direction there is a component of retarding force of air resistance alone.
A
If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B
If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.
C
If Assertion is True but the Reason is False.
D
If both Assertion & Reason are False
Text Solution
Verified by Experts
The correct Answer is:
A
`N//A`
Topper's Solved these Questions
Similar Questions
Explore conceptually related problems
A ball is thrown vertically upwards. Which of the following plots represent the speed graph of the ball during its flight if the air resistence is not ignored?
Assertion:- A bowler throuws a ball such that it moves in air with constant angular velocity (Ignorning the air resistance) Reason:- Spin angular momentum of ball is independent of reference frame
a projectile is thrown with speed u into air from a point on the horizontal ground at an angle theta with horizontal. If the air exerts a constant horizontal resistive force on the projectill then select correct alternative(s).
A player throwsa a ball upwards with an initial speed of 29.4 ms^(-1) . (i) What is the direction of acceleration during the upwared motion of the ball? (ii) What are the velocity and acceleration of the ball at the highest point of its motion? (iii) Choose the x=0 and t=0 to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of X-axis, and give the signs of positive, velocity and acceleration of the ball during its upward, and downward motion. (iv) To what height does the ball rise and after how long does the ball return to the player's hand?( Take g =9.8 ms^(-2) , and neglect air resistance).
A player throws a ball upwards with an initial speed of 29.4 ms^(-1) (a) What is the direction of acceleration during the upward motion of the ball ? (b) What are the velocity and acceleration of the ball at the highest point of its motion ? (c) Choose the x = 0 m and t=0 s to be the location and time of the ball at its highest point vertically downward direction to be the positive direction of x-axis and give the signs of position, velocity and acceleration of the ball during its upward and downward motion. (d) To what height does the ball rise and after how long does the ball return to the player's hands ? (Take g = 9.8 ms^(-2) and neglect air resistance).
A projectile is thrown with speed u into air from a point on the horizontal ground at an angle theta with horizontal. If the air exerts a constant horizontal resistive force on the projectile then select correct alternative(s).
Two stones are thrown up simultaneously from the edge of a cliff 200 m high with initial speeds of 15 ms^(- ) and 30 ms^(-1). Verify that the graph shown in figure. Correctly represents the time variation of the relative position of the second stone with respect to the first. Neglect air resistance and assume that the stones do not rebound after hitting the ground. Take g = 10 ms^(-2). Give the equations for the linear and curved parts of the plot.
A physical quantity is a phyical property of a phenomenon , body, or substance , that can be quantified by measurement. The magnitude of the components of a vector are to be considered dimensionally distinct. For example , rather than an undifferentiated length unit L, we may represent length in the x direction as L_(x) , and so forth. This requirement status ultimately from the requirement that each component of a physically meaningful equation (scaler or vector) must be dimensionally consistent . As as example , suppose we wish to calculate the drift S of a swimmer crossing a river flowing with velocity V_(x) and of widht D and he is swimming in direction perpendicular to the river flow with velocity V_(y) relation to river, assuming no use of directed lengths, the quantities of interest are then V_(x),V_(y) both dimensioned as (L)/(T) , S the drift and D width of river both having dimension L. with these four quantities, we may conclude tha the equation for the drift S may be written : S prop V_(x)^(a)V_(y)^(b)D^(c) Or dimensionally L=((L)/(T))^(a+b)xx(L)^(c) from which we may deduce that a+b+c=1 and a+b=0, which leaves one of these exponents undetermined. If, however, we use directed length dimensions, then V_(x) will be dimensioned as (L_(x))/(T), V_(y) as (L_(y))/(T), S as L_(x)" and " D as L_(y) . The dimensional equation becomes : L_(x)=((L_(x))/(T))^(a) ((L_(y))/(T))^(b)(L_(y))^(c) and we may solve completely as a=1,b=-1 and c=1. The increase in deductive power gained by the use of directed length dimensions is apparent. From the concept of directed dimension what is the formula for a range (R) of a cannon ball when it is fired with vertical velocity component V_(y) and a horizontal velocity component V_(x) , assuming it is fired on a flat surface. [Range also depends upon acceleration due to gravity , g and k is numerical constant]
Two small balls having the same mass and charge and located on the same vertical at heights h_(1) and h_(2) are thrown in the same direction along the horizontal at the same velocity v. The first ball touches the ground at a horizontal distance R from the initial vertical position. At what height h_(2) will the second ball be at this instant? Neglect any frictional resistance of air and the effect of any induced charge on the ground.
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45^@ with the horizontal direction? Ignore air resistance.
ALLEN -TEST PAPER-PHYSICS
- Assertion:- A ball is thrown from the edge of a very high clif. No mat...
Text Solution
|
- Choose the correct statement:
Text Solution
|
- Initially elongation in spring is 5 cm and blocks are at rest. An exte...
Text Solution
|
- Figure shows path of two projectiles A and B choose the correct option...
Text Solution
|
- A particle moves in straight line. Acceleration of particle changes wi...
Text Solution
|