(English Medium) ICSE Class 10 - CISCE Important Questions for Physics

Explain the motion of a planet around the Sun in a circular path.

Where can a body execute free vibrations?

A nut is opened by a wrench of length 20 cm. If the least force required is 2N, find the moment of force needed to loosen the nut.

A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?

What is the weight of a body placed at the centre of the earth?

Is it possible to have an accelerated motion with a constant speed? Explain

Why is the motion of a body moving with a constant speed around a circular path said to be accelerated?

A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.

1) Which of the two forces acting on the rigid rod causes clockwise moment?

2) Is the rod in equilibrium?

3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?

Write S.I. unit of moment of couple.

At which point is the centre of gravity situated in a triangular lamina?

Define couple. 

A uniform meter scale is in equilibrium as shown in the diagram : 

(i) Calculate the weight of the meter scale.
(ii) Which of the following options is correct to keep the ruler in equilibrium when 40 gf wt is shifted to 0 cm mark ?
F is shifted towards 0 cm
or
F is shifted towards 100 cm

Clockwise moment produced by a force about a fulcrum is considered to be ______.

When this triangular lamina is suspended freely from any one vertex, what is the moment of force produced by its own weight in its rest position?

The diagram shows wheel O pivoted at point A. Three equal forces F₁, F₂ and F₃ act at point B on the wheel.

1. Which force will produce maximum moment about A?
2. Give a reason for your answer in (a).

A door lock is opened by turning the lever (handle) of length 0.2 m. If the moment of force produced is 1 Nm, then the minimum force required is ______.

When a stone tied to a string is rotated in a horizontal plane, the tension in the string provides ______ force necessary for circular motion.

A non uniform beam of weight 120 N pivoted at one end is shown in the diagram below. Calculate the value of F to keep the beam in equilibrium.

A hollow ice cream cone has height 6 cm.

1. Where is the position of its center of gravity from the broad base?
2. Will its position change when it is filled completely with honey? Write Yes or No.