A metal ball of mass 40 g falls vertically onto a spring, as shown in Fig. 4.1.

Q#17 A metal ball of mass 40 g falls vertically onto a spring, as shown in Fig.… Read more A metal ball of mass 40 g falls vertically onto a spring, as shown in Fig. 4.1.

A hot-air balloon is moving vertically upwards with a constant speed of 3.00 m s-1.

Q#37 A hot-air balloon is moving vertically upwards with a constant speed of 3.… Read more A hot-air balloon is moving vertically upwards with a constant speed of 3.00 m s-1.

A boy throws a stone with a horizontal velocity of 10 m s-1 from the top of a building.

Q#38 A boy throws a stone with a horizontal velocity of 10 m s -1   from the to… Read more A boy throws a stone with a horizontal velocity of 10 m s-1 from the top of a building.

Four cuboids with identical length, breadth and height are immersed in water.

Q#46 Four cuboids with identical length, breadth and height are immersed in wat… Read more Four cuboids with identical length, breadth and height are immersed in water.

Two small solid metal spheres A and B have equal radii and are in a vacuum. Their centres are 15 cm apart.

Q#30 Two small solid metal spheres A and B have equal radii and are in a vacuum… Read more Two small solid metal spheres A and B have equal radii and are in a vacuum. Their centres are 15 cm apart.

(a) State Newton’s law of gravitation (b) The planet Jupiter and one of its moons,

Q#11 (a)  State Newton’s law of gravitation. [2] (b)  The planet Jupiter and on… Read more (a) State Newton’s law of gravitation (b) The planet Jupiter and one of its moons,