Physics: Topic-wise Test- 1 - NEET MCQ

A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is

An engine pumps up 100 kg of water through a height of 10m in 5 sec then if the efficiency of the engine os 60% then calculate the power of the engine where g = 10m/s

A block of mass 4 kg is placed on a rough horizontal plane. A time dependent force F = k t acts on the block, where k = 2 N/s² Force of friction between block and the plane at t = 2 sec (given coefficient of friction is 0.3)

A particle collides with another particle such that the second particle starts moving and the first particle stops just after the collision. Then which of the following conditions must always be valid? (m/M = ratio of masses)

A sphere has a perfectly elastic oblique collision with another identical sphere, which is initially at rest. The angle between their direction after the collision is

Two bodies having masses in the ratio of 3 : 1 possess the same kinetic energy. The ratio of their linear momentum is

The equation of a wave is given by y = Asin ω(x/v-K) Where Asin ω is angular velocity and v is linear velocity. The dimension of K is

If two numerically equal forces P & P acting at a point produce a resultant force of magnitude P itself, then the angle between the two original forces is

A physical quantity X is related to four observables a,b,c & d as follows X = a³b²/d√c. The percentage error of measurement in a,b,c and d are 1%,3%,4% & 2% respectively, the percentage error in the quantity X is

A particle moving in a straight line covers half the distance with speed of 3m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s 7.5m/s respectively. The average speed of the particle during this motion is

A particle moves along a straight line such that its displacement at any time is given by s = t³ - 6t² + 3t + 4 meters. The velocity when the acceleration is zero is

Three blocks of masses M₁,M₂ & M₃ are connected by mass-less strings as shown on a friction-less table. They are pulled with a force T₃ = 40N. If M₁ = 10Kg, M₂ = 6Kg, M₃ = 4KKg   then Tension T₂ will be:

The blocks of mass M₁ and M₂ are connected to each other through a light spring as shown in figure. If we push mass M₁ with a force of F and cause acceleration a in mass M₁, what will be the acceleration in M₂:

A balloon has 5gm of air. A small hole is pierced into it, the air escapes at a uniform rate with a velocity of 4cm/sec. If the balloon shrinks completely in 2.5 second, the mean force acting on the balloon is

Two skaters of masses 40 kg and 60 kg respectively stand facing each other at S₁ and S₂ where S₁S₂ is 5m. They pull on a massless rope stretched between them, then they meet at

A man sits on a chair supported by a rope passing over a friction less fixed pulley. The man who weights 1000N exerts a force of 450 N on the chair downwards while pulling on the rope. If the chair weight 250 N and g is 10 ms^-2, then the acceleration of the chair is

A block of mass 4 kg is suspended through two light spring balances A and B. Then A and B will read __respectively

In a rocket of mass 1000 kg fuel is consumed at a rate of 40 kg/s.The velocity of the gases ejected from the rocket is 5 x 10⁴ m/s.The thrust on the rocket is 

Which of the following statements is false ?

A man walks over a rough surface; the angle between force of friction and the instantaneous velocity of the person is

A heavy uniform chain lies on a horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25, then the maximum fraction of the length of the chain, that can hang over one edge of the table is

A particle is projected along the line of greatest slope up a rough plane inclined at an angle of 45°  with the horizontal. If the coefficient of friction is 1/2, their retardation is

A ball thrown vertically upward returns to its starting point in 4s. Its initial speed is

A stone is dropped from a certain height which can reach the ground in 5 second. If the stone is stopped after 3 second of its fall and then allowed to fall again, then the time taken by the stone to reach the ground for the remaining distance is

A stone is projected upwards from the top of a building with some initial speed and reaches the ground in 5sec. Now it is allowed to fall with the same initial speed downwards and reaches the ground in 3 sec. If the stone is allowed to fall freely under gravity from the same point, it will reach the ground in

The position of a projectile is given by x = v₀t - Kt² where v0 equals 250 m/s and t is measured in seconds. Given that the velocity of the projectile falls to a value of 150 m/s at t = 5s. The value of the K is

The two ends of a train moving with a constant acceleration pass a certain point with velocities u and v. The velocity with which the middle point of the train passes the same point is