Skip to main content
MediumPhysicsNewton's Laws of Motion
+4 / -1
A rocket of mass 800 kg is to be projected vertically upwards. The gases are exhausted vertically downwards with velocity 40 m/s with respect to the rocket. What is the minimum rate of burning fuel, so as to just lift the rocket upwards against the gravitational attraction? (Take g = 10 m/s²)
A
80 kg/s
B
400 kg/s
C
200 kg/s
D
800 kg/s
Previous

In figure, a ball of mass m₁ and a block of mass m₂ are joined together with an

Next

Given below are two statements: one is labelled as Assertion A and the other is

More from Newton's Laws of Motion
Medium

A steel rod of length 25 cm has a cross-sectional area of 0.8 cm². The force required to stretch thi

Medium

Figure shows three forces applied to trunk that moves leftward by 3m over a smooth floor. The force

Medium

A body moves along a horizontal circular path of radius 5 m. The coefficient of friction between the

Medium

A block slides down a frictionless incline making an angle θ with the floor at an elevator. The elev

Easy

The maximum velocity (in ms⁻¹) with which a car driver can traverse a flat curve of radius 150 m and

Medium

Two blocks of masses 2m and m are in equilibrium as shown in the figure. Now the string between the

Practice Physics Exams

Full-length mock tests with detailed analytics, rank, and percentile.

Browse Exams