PHY101 Midterm by VU Topper RM

Q1. Vu-Topper RM (1 marks)

Light year is a unit of:

Distance

Q2. Vu-Topper RM (1 marks)

A force of 100 N acts upon a body for five seconds. What will be the change in momentum?_____.

500Ns

Q3. Vu-Topper RM (1 marks)

Add two vectors of length 4 m & 5 m but their orientation is not known. The length after addition of these two vectors will be:

Between 9m and 1m

Q4. Vu-Topper RM (1 marks)

Example of physical quantity is:

Length

Q5. Vu-Topper RM (1 marks)

An inelastic collision is one in which:

kinetic energy

Q6. Vu-Topper RM (1 marks)

Acceleration in a body is always produced in the direction of:

Velocity

Q7. Vu-Topper RM (1 marks)

Ali wants to lift a mass of 7.5 kg with constant velocity by a rope that passes through a frictionless pulley which is attached to the ceiling of room. Calculate the tension in the rope by neglecting the mass of the rope.

0.75N

Q8. Vu-Topper RM (1 marks)

Newton-second is SI unit of:

Impulse

Q9. Vu-Topper RM (1 marks)

The area under the curve of force-displacement graph represents:

Fs

When you step on the accelerator to increase the speed of your car, the force that accelerates the car is?

Fricti0n

Is the total momentum of a system is changing?

A next external force must be acting 0n the system

If the acceleration of a body is not uniform, then velocity-time graph will be: A curved line.

The goal of all scientific inquiry (or scientific method) is: predicting natural events based.

The law of conservation of momentum applies to a system of colliding objects only if:

The net external Impulse is zero

Work has dimensions like:

power

The work done by gravity during the descent of a projectile:

Is positive

An object moves in a circle at constant speed. The work done by the centripetal force is zero because:

The centripetaI force is perpendicular to the velocity

The dimensional units of ratio of work and power is:

T

A heavy particle moving with 5 m/s suffers an elastic collision with a light particle at rest. After collision, the velocity of light particle will be:

5 m/s

Which of the following statement/s is / are true?

1 olny

The law of inertia was firstly formulated by:

Galileo

The product of force and time is called change in:

Momentum

It is easier to walk on the concrete road than on ice because:

The friction between the ice and the feet is lees

What is the angle of projection of projectile, for which its maximum height and horizontal range are equal?

76*

The SI standard of time is based on: none of these

A net torque applied to a rigid object always tends to produce:

rotational equilibrium

linear acceleration