✕
  1. Tardigrade
  2. Question
  3. Physics
  4. A target is made of two plates, one of wood and the other of iron. The thickness of the wooden plate is 4 cm and that of the iron plate is 2 cm . A bullet fired goes through the wood first and then penetrates 1 cm into iron. A similar bullet fired with the same velocity from the opposite direction goes through iron first and then penetrates 2 cm into the wood. If a1 and a2 be the retardation offered to the bullet by wood and iron plates respectively, then

Q. A target is made of two plates, one of wood and the other of iron. The thickness of the wooden plate is and that of the iron plate is . A bullet fired goes through the wood first and then penetrates into iron. A similar bullet fired with the same velocity from the opposite direction goes through iron first and then penetrates into the wood. If and be the retardation offered to the bullet by wood and iron plates respectively, then

NTA AbhyasNTA Abhyas 2022 Report Error

Solution:

Let and be the retardations offered to be bullet by wood and iron respectively.
For
and
Adding, we get
...(i)
For

and
Adding, we get
....(ii)
Equating Eqs. (i) and (ii) and solving, we get

Questions from NTA Abhyas 2022

1. A thin semicircular conducting ring of the radius is falling with its plane vertical in a horizontal magnetic induction . At the position MNQ, the speed of the ring is and the potential difference developed across the ring is

2. An ideal gas at is compressed adiabatically to of its original volume. If , then the rise in temperature is

3. Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?

4. Two perfectly elastic objects and of identical mass are moving with velocities and respectively, collide along the direction of line joining them. Their velocities after the collision are respectively

5. The force of repulsion between two point charges is , when these are at distance apart. Now the point charges are replaced by non conducting spheres of radii each having the same charge as that of the respective point charges. The distance between their centres is again kept Then the force of repulsion will

Electrostatic Potential and Capacitance

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids

Latest Updates