- Linear momentum (p) is given by the product of mass (m) and velocity (v). The unit of linear momentum is kg.m/s, which is equivalent to N.s (Newton-second). Given m = 10 kg and v = 10 m/s, p = m v = 10 kg 10 m/s = 100 kg.m/s = 100 N.s.- Kinetic energy (KE) is given by the formula 0.5 m v². The unit of kinetic energy is Joules (J). Given m = 10 kg and v = 10 m/s, KE = 0.5 10 kg (10 m/s)² = 0.5 10 kg 100 m²/s² = 5 100 J = 500 J.Therefore, the linear momentum is 100 N.s and the kinetic energy is 500 J.
If an object of mass 10 kg is moving with a uniform speed of 10 m/s, then the linear momentum and the kinetic energy of the object, respectively, are
Asked in UPSC CDS 2 2022 · Topic: Mechanics (Work, Energy, and Power)
More Physics questions
- In which of the following situations will an applied force do negative work on a body?
- A frictionless pulley has a rope of negligible mass passing over it. Blocks of mass 15 kg and 5 kg are attached at the two ends of the rope and held stationary. When the masses are released to move freely, their speed in m s-1, after the rope has slipped by 0.25 m over the pulley, is closest to : (take g = 10.0 m s-2)
- A ball of mass 100 g falls freely from a height of h = 20 m and hits the ground at a speed of 1·4 √gh. Take g = 10 m s⁻². Which one among the following is the correct value of the work done on the ball by air friction ?
- A spherical ball is divided into two equal halves. If the curved surface area of each half is 56.57 cm², then what is the volume of the spherical ball? [π = 3.14]
- The volume of globe varies as the cube of its radius. Three solid globes of diameters 1$ \frac{1}{2}$, 2 and 2$\frac{1}{2}$ metres are melted and formed into a new solid globe. What is the diameter of the new globe?
- If a> 0 and a*—62a>+ 1 =0, what is the value of a*> + 1/a® ?
- A simple machine helps a person in doing :
- एक सिाधारण मशीन, एक व्ǔक्त को क्ा करने में सिहाता करती है ?