Physics MCQ Questions with answers

Explanation:
Therefore, a body at rest stores energy here, which is called potential energy. Momentum- The momentum of any object that is at rest is zero. Objects at rest do not have momentum as they do not have any "mass in motion". Both variables - mass and velocity - are important for calculating momentum

Explanation:
Electric charge (q) = 5 C difference (V) = 16 V Work done (W) = charge (q) × potential difference (V) Work done (W) = 5 × 16 = 80 J

Explanation:
The atmospheric pressure at sea level is 1 atm

Explanation:
According to Galileo Galilei, if objects of different masses are dropped from the same height in the absence of air resistance the bodies will ground together at the same time

Explanation:
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another

Explanation:
The density of a substance is its mass per unit volume

Explanation:
one joule per second is equivalent to one watt. The SI units for work and time are Joules and seconds, respectively. Therefore, One Watt was defined as a power of 1 Joule per second

Explanation:
Given, the mass of the body, m = 50 kg. h is the height, t is the time. g is the acceleration due to gravity which is aproximated to 10 m/s2 ? h = 45 × 14 = 630 cm = 6.30 m t = 10 s, g = 10 ms-2 Potential Energy = mgh = 50 × 10 × 6.30 = 3150 J. (where J is the unit of energy/work which is joules) Power = PE / time = Energy / time = 3150 / 10 = 315 watt. (watt is the unit of power which is different from units)

Explanation:
Mass of object = 13 Kg Speed of object = 5 m/s Now from the above explanation, we can see that, ? Kinetic energy possessed by the object = 1/2 × 13 × (5) ? 1/2 × 13 × 25 = 162.5 J

Explanation:
Malleability - Ability of metals to be beaten into thin sheets