A car travels half of the total distance with constant speed 40 km/h and another half with a constant speed of 60 km/h along a straight line. The average speed of car is

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Questions Match

1.
A car travels half of the total distance with constant speed 40 km/h and another half with a constant speed of 60 km/h along a straight line. The average speed of car is

1. 24 km/h2. 48 km/h3. 60 km/h4. 40 km/h

2.
In which of the following graphs, the total change in momentum is zero?

1. 2. 3. 4.

3.
A solid sphere of mass 1000 g and radius 10 cm rolls without slipping with the velocity 20 cm/s. The total kinetic energy of the sphere will be

1. 28 × 10–3 J2. 5.2 × 10–2 J3. 14 J4. 25 J

4.
A circular disc of mass 0.41 kg and radius 10 m rolls without slipping with a velocity of 2 m/s. The total kinetic energy of disc is

1. 0.41 J2. 1.23 J3. 0.82 J4. 2.4 J

5.
The total number of electrons in 4.2 g of N^3– is

1. 2.1 NA2. 4.2 NA3. 3 NA4. 3.2 NA

A car travels half of the total distance with constant speed 40 km/h and another half with a constant speed of 60 km/h along a straight line. The average speed of car is