6 practice questions for this chapter, gradeable instantly.
Q1
A moving truck applies brakes and stops after traveling 20 m. If its kinetic energy was 4000 J, then the average braking force will be
Q2
In a conservative field, the work done in moving a body around a closed loop is always
Q3
A lighter metallic ball () collides with a much heavier metallic ball () which is at rest, and (), then after an elastic collision, the heavier ball () will
Q4
An object falls freely from rest. The total distance covered by it in 2 s will be (Note: The acceleration due to gravity 'g' is .)
Q5
A moving car crashes into a stack of sandbags. It hits the sandbags and passes through them. When the car hits the sandbags, the total momentum of the car
Q6
The law of conservation that is used in the propulsion of rockets is