Inertial vs Non Inertial Frames

Q. 10.Two circular loops A and B of radii Ra and Rb respectively are made from the same uniform wire.The ratio of their moments of inertia about axes passing through their centres and perpendicular to their planes is IB/IA =8, then (Rb/Ra)=

Q. A block of mass 15 kg is placed on a long trolley. The coefficient of static friction between the block and the trolley is 0.18. The trolley accelerates from rest with 0.5 m s¯² for 20 s and then moves with uniform velocity. Discuss the motion of the block as viewed by (a) a stationary observer on the ground, (b) an observer moving with the trolley.

Q. Prove the keplers third law of motion.

Q. 25.A wheel of inertia 4 kg meter-square about its symmetrical axis, rotates at rate of 240 rpm about it. The torque which can stop the rotation of the wheel in one mintues is

Q. 68. Assertion :A negative acceleration of a body can be associated with a speeding up of the body. Reason :Increase in speed of a moving body is independent of its direction of motion.

Q. A frame of reference is said to be inertial if...

1. Newton's laws of motion hold good
2. Newton's laws of motion do not hold good
3. The frame of reference accelerates
4. The frame of reference decelerates

Q. A reference frame attached to the earth
(a) is an inertial frame by definition
(b) cannot be an inertial frame because the earth is revolving around the sun
(c) is an inertial frame because Newton's laws are applicable in this frame
(d) cannot be an inertial frame because the earth is rotating about its axis

Q. A projectile is given an initial velocity of

1. 
2. 
3. 
4. 

Q. 17.If mass of earth decreases by 25% and its radius increases by 50%, then acceleration due to gravity at its surface decreases by?

Q. Explain three laws of motion

Q. 128.Two blocks of mass 2 kg and 3 kg are attached to the ends of a string passing over a smooth pulley fixed to the ceiling of the elevator. A man inside the elevator finds the acceleration of the system to be g/4. The acceleration of the elevator is? ?

Q. 27. The friction of the air causes vertical retardation equal to one tenth of the acceleration due to gravity (take g=10).Find the decrease in the time of flight?

Q. 9.) If radius of earth shrinks by 1.5% but mass remains same , then the value of gravitational acceleration changes by (in %)

Q.

Rajat is sitting in an open cart that moves horizontally with an acceleration of $5m/s^2$ rightwards. Rajat is unaware of his acceleration, and throws a ball up in the air. He attempts at drawing a Free Body Diagram of the ball assuming his frame to be inertial. Which of these would closely resemble his free body diagram of the ball (neglect air drag)?

1. 

2. 

3. 

4. 

Q. What are the laws of motion?

Q. The acceleration of a particle is zero, as measured from an inertial frame of reference. Can we conclude that no force acts on the particle?

Q.

Rajat is sitting in an open cart that moves horizontally with an acceleration of $5m/s^2$ rightwards. Rajat is unaware of his acceleration, and throws a ball up in the air. He attempts at drawing a Free Body Diagram of the ball assuming his frame to be inertial. Which of these would closely resemble his free body diagram of the ball (neglect air drag)?

1. 

2. 

3. 

4. 

Q. It is sometimes heard that the inertial frame of reference is only an ideal concept and no such inertial frame actually exists. Comment.

Q.

What is weightlessness?

Q.

A bird is sitting in a wire cage hanging from the spring balance. Let the reading of the spring balance be $W_1$.If the bird flies about inside the cage, the reading of the spring balance is $W_2$. Which of the following is true

1. $W_1=W_2$

2. $W_1>W_2$

3. $W_1<W_2$

4. Nothing definite can be predicted

Q. Define laws of motion.

Q. A reference frame attached to the earth
(A) Is an inertial frame by definition
(B) Cannot be an inertial frame because the earth is revolving around the sun.
(C) Is an inertial frame because Newton's laws are applicable in this frame
(D) Cannot be an inertial frame because the earth is rotating about its own axis.
Which of the above statements is /are correct?

1. A only
2. A and B
3. B and D
4. D only

Q. Describe three laws of motion

Q. A uniform thin circular ring of mass M and radius R is bent 8-shaped planar loop. Assuming the two smaller loops to be identical, what is the moment of inertia of this system about an axis passing through their common point and perpendicular to the plane?​

Q. what are the law of motion.

Q. Newton's laws can be applied in a non-inertial frame

1. True
2. False

Q. 2. Explain newtons first law of motion with the help of mathematical expression of newtons second law of motion

Q. What is second law of motion?

Q. what is law of motion

Q. A person says that he measured the acceleration of a particle to be non-zero even though no force was acting on the particle.
(a) He is a liar.
(b) His clock might have run slow.
(c) His metre scale might have been longer than the standard.
(d) He might have used a non-inertial frame.