Physics

What is the potential energy of the body?

• A) the kinetic energy of the body.

• B) the energy of change of velocity of the body.

• C) the energy of change of temperature

• D) the energy transferred from a hot body to a cold body.

• E) energy associated with the motion of body molecules.

The car started moving and reached a speed of 36 m / s in 6 seconds. Acceleration of the car...

• A) 5 m / s2

• B) 36 m / s2

• C) 6 m / s2

• D) 0.1 m / s2

• E) 2 m / s2

The force required to lift a body of mass 10 kg with an acceleration of 8 m / s2

• A) 180 N

• B) 80 N

• C) 100 N

• D) 20 N

• E) 8 N

If the ball receives an acceleration of 0.2 m / s2 under the force of 0.1 N, its mass

• A) 0.005 kg

• B) 0.5 kg

• C) 0.05 kg

• D) 0.65 kg

• E) 50 kg

Under a force of 10 N, the spring elongated by 0.1 m. Spring stiffness

• A) 10 N / m

• B) 0.01 N / m

• C) 0.1 N / m

• D) 1 N / m

• E) 100 N / m

Time of ascent of a body thrown vertically at a speed of 44 m / s to a height of 100 m

• A) 5 s

• B) 4.4 s

• C) 440 s.

• D) 3.4 s

• E) 1.02 s.

Elevation of a body thrown vertically and falling to the ground after 8 s

• A) 60 m.

• B) 80 m.

• C) 75 m.

• D) 76 m.

• E) 90 m.

Period of rotation of an artificial satellite at an altitude of 300 m

• A) ≈80 min

• B) ≈1.4 hours

• C) ≈90 sec

• D) ≈1.5 min

• E) ≈60 min

The speed given to the body to become an artificial satellite of the earth

• A) ≈ 10 km / h

• B) ≈8 km / h

• C) ≈6 km / h

• D) ≈4 km / h

• E) ≈2 km / h

Along a horizontal wooden board, a piece of wood weighing 2 kg is pulled by a spring with a stiffness of 100 N / m. If the coefficient of friction is 0.3, the elongation of the spring

• A) 0.6 m

• B) 0.06 m

• C) 6 m

• D) 0.06 cm

• E) 0.06 mm