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Physics-

General

Easy

Question

An athlete completes one round of a circular track of radius 10 m in 40 sec. The distance covered by him in 2 min 20 sec is :

70 m
140 m
110 m
220 m

The correct answer is: 220 m

Related Questions to study

Assertion: The binding energy of a satellite does not depend upon the mass of the satellite.
Reason : Binding energy is the negative value of total energy of satellite.

Assertion: The binding energy of a satellite does not depend upon the mass of the satellite.
Reason : Binding energy is the negative value of total energy of satellite.

Physics-General

Assertion: There is no effect of rotation of earth on acceleration due to gravity at poles.
Reason : Rotation of earth is about polar axis.

Assertion: There is no effect of rotation of earth on acceleration due to gravity at poles.
Reason : Rotation of earth is about polar axis.

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What does not change in the field of central force

What does not change in the field of central force

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The earth E moves in an elliptical orbit with the sun S at one of the foci as shown in figure. Its speed of motion will be maximum at the point-

The earth E moves in an elliptical orbit with the sun S at one of the foci as shown in figure. Its speed of motion will be maximum at the point-

physics-General

Kepler’s second law regarding constancy of aerial velocity of a planet is a consequence of the law of conservation of-

Kepler’s second law regarding constancy of aerial velocity of a planet is a consequence of the law of conservation of-

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A geo-stationary satellite is orbiting the earth at a height of 6R above the surface of earth, R being the radius of earth. The time period of another satellite at a height of 2.5R from the surface of earth is :

A geo-stationary satellite is orbiting the earth at a height of 6R above the surface of earth, R being the radius of earth. The time period of another satellite at a height of 2.5R from the surface of earth is :

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parallel

Two satellites A and B go round a planet P in circular orbits having radii 4R and R respectively. If the speed of the satellite A is 3V, the speed of the satellite B will be.

Two satellites A and B go round a planet P in circular orbits having radii 4R and R respectively. If the speed of the satellite A is 3V, the speed of the satellite B will be.

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The escape velocity of a projectile from the earth is approximately-

The escape velocity of a projectile from the earth is approximately-

Physics-General

If $x to the power of 2 end exponent plus y to the power of 2 end exponent minus 4 x minus 6 y plus c equals 0$ is the circumcircle of the triangle formed by three tangents to the parabola $y to the power of 2 end exponent equals 4 x minus 4 comma$ then radius of the circle is

If $x to the power of 2 end exponent plus y to the power of 2 end exponent minus 4 x minus 6 y plus c equals 0$ is the circumcircle of the triangle formed by three tangents to the parabola $y to the power of 2 end exponent equals 4 x minus 4 comma$ then radius of the circle is

parallel

A line bisecting the ordinate PN of a point $P open parentheses a t to the power of 2 end exponent comma 2 a t close parentheses comma t greater than 0 comma$ on the parabola $y to the power of 2 end exponent equals 4 a x$ is drawn parallel to the axis to meet the curve at Q. If NQ meets the tangent at the vertex at the point T, then the coordinates of T are

A line bisecting the ordinate PN of a point $P open parentheses a t to the power of 2 end exponent comma 2 a t close parentheses comma t greater than 0 comma$ on the parabola $y to the power of 2 end exponent equals 4 a x$ is drawn parallel to the axis to meet the curve at Q. If NQ meets the tangent at the vertex at the point T, then the coordinates of T are

Three normals drawn from any point to the parabola y² = 4ax cut the line x = 2a in points whose ordinates are in arithmetical progression. Then the tangents of the angles which the normals make the axis of the parabola are in :

Three normals drawn from any point to the parabola y² = 4ax cut the line x = 2a in points whose ordinates are in arithmetical progression. Then the tangents of the angles which the normals make the axis of the parabola are in :

PQ is a normal chord of the parabola y2 = 4ax at P, A being the vertex of the parabola. Through P a line is drawn parallel to AQ meeting the x-axis in R. Then the length of AR is :

PQ is a normal chord of the parabola y2 = 4ax at P, A being the vertex of the parabola. Through P a line is drawn parallel to AQ meeting the x-axis in R. Then the length of AR is :

parallel

The particle A is converted to C via following reactions then $A rightwards arrow B plus H e to the power of 4 end exponent B rightwards arrow C plus 2 e to the power of 0 end exponent$

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If the atom ₁₀₀Fm²⁵⁷ follows Bohr model and the radius of last orbit of ₁₀₀Fm²⁵⁷ is n times the Bohr radius, then find n

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he intensity of X-rays from a coolidge tuberin’s plotted against wavelength $lambda$ as shown the figure The minimum wavelength found is $lambda subscript c end subscript$
and the wavelength of the $K subscript alpha end subscript$ line is $lambda subscript k end subscript$ As the accelerating voltage is increased

he intensity of X-rays from a coolidge tuberin’s plotted against wavelength $lambda$ as shown the figure The minimum wavelength found is $lambda subscript c end subscript$
and the wavelength of the $K subscript alpha end subscript$ line is $lambda subscript k end subscript$ As the accelerating voltage is increased

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