# Question Set with Numerical Problems

## Solution to problems – class 9 physics – Set 1 Q 60

Problem Statement 60) A metallic sphere of mass 2 kg and volume 2.5 x 10-4 m3 is completely immersed in water. Find the buoyant force exerted by water on the sphere. Density of water = 1000 kg/m3 Solution Volume of the water displaced = volume of the completely immersed sphere=2.5 x 10-4 m3 Mass of […]

## Solution to problems – class 9 physics – Set 1 Q 59

Problem Statement 59) A man wearing a bullet-proof vest stands still on roller skates. The total mass is 80 kg. A bullet of mass 20 grams is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man ? Solution When both man […]

## Solution to problems – class 9 physics – Set 1 Q 58

Problem Statement 58) A heavy car A of mass 2000 kg travelling at 10 m/s has a head-on collision with a sports car B of mass 500 kg. If both cars stop dead on colliding, what was the velocity of car B ? Solution Say, velocity of B before collision be V m/s Initial momentum […]

## Solution to problems – class 9 physics – Set 1 Q 57

Problem Statement 57) A ball X of mass 1 kg travelling at 2 m/s has a head-on collision with an identical ball Y at rest. X stops and Y moves off. Calculate the velocity of Y after the collision. Solution Initial momentum of X = 1×2 kg m/s = 2 kg m/s …………….(i) After collision […]

## Solution to problems – physics class 9 – Set 1 Q 56

Problem Statement 56)A truck of mass 500 kg moving at 4 m/s collides with another truck of mass 1500 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together? Solution Total initial momentum = 500 x 4 + 1500 x 2 = […]

## Solution to problems – class 9 physics – Set 1 Q 55

Problem Statement 55) A girl of mass 50 kg jumps out of a rowing boat of mass 300 kg on to the bank, with a horizontal velocity of 3 m/s. With what velocity does the boat begin to move backwards ? Solution As no initial velocity is given in the problem statement, we will consider […]

## Solution to problems – class 9 physics – Set 1 Q 54

Problem Statement 54) A boy of mass 50 kg running at 5 m/s jumps on to a 20 kg trolley travelling in the same direction at 1.5 m/s. What is their common velocity? Solution Initial total momentum= (50 x 5 + 20 x 1.5 ) kg m/s = 280 kg m/s Final combined mass = […]

## Solution to problems – class 9 physics – Set 1 Q 53

Problem Statement 53) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g/cm^3. Solution (continuing with cgs system data)Pressure of mercury column is hdg = 70 x 13.6 x g ……..(1) let the height of water […]

## Solution to problems – class 9 physics – Set 1 Q52

Problem Statement 52) The area of base of a cylindrical vessel is 300 cm^2. Water (density = 1000 kg /m^3) is poured into it up to a depth of 6 cm. Calculate: (a) the pressure and (b) the thrust of water on the base. (g = 10 m/ s^2). Solution Pressure = hdg=(6/100)x1000x10 = 600 […]

## Solution to problems – class 9 – Set 1 Q 48

Problem Statement 48) A ball is thrown vertically upwards from the top of a tower with an initial velocity of 19·6 m/s. The ball reaches the ground after 5 s. Calculate: (i) the height of the tower, (ii) the velocity of ball on reaching the ground. Take g = 9·8 m/s^2 Follow my blog with […]

## Solution to problems – class 9 – Set 1 Q37, 38, 39, 40, 41

solution of 5 numericals from Q set 1 for class 9. Motion under gravity is the primary focus of the following problems. Upward and downward movement, maximum height reached, time to reach the maximum height, velocity just before touching the ground etc are the touched upon points of these sort of numerical problems in physics. […]

## Solution to problems – class 9 – Set 1 Q31, Q32, Q33

Problem Statement 31) If a box is pushed horizontally on the floor with a force of 10 N and it moves 5 meter along the line of action of the force, then what is the work done by the Gravity or earth’s gravitational pull on that box ? Solution:The angle between gravity and the displacement […]

## Solution to problems – class 9 – Set 1 Q 27

Problem Statement A bullet leaves a rifle with a muzzle velocity of 600 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.8 m. Determine the acceleration of the bullet (assume a uniform acceleration). Solution Initial velocity of the bullet U=0 Final velocity of the bullet = muzzle velocity […]

## Solution to problems – class 9 – Set 1 Q 28

Problem Statement A bullet is moving at a speed of 350 m/s when it embeds into a lump of moist clay. The bullet penetrates for a distance of 0.05 m. Determine the acceleration of the bullet while moving into the clay. (Assume a uniform acceleration.) Solution to physics problem Initial velocity of the bullet U=350 […]

## Solution to problems – class 9 – Set 1 Q 29

Problem Statement A plane has a takeoff speed of 100 m/s and requires 1500 m to reach that speed. Determine the acceleration of the plane and the time required to reach this speed. Solution It starts from rest. So initial velocity U = 0  Final velocity = take off velocity = V = 100 m/s   […]

## Solution to problems – class 9 – Set 1 Q 30

Problem Statement A baseball is popped straight up into the air and has a hang-time of 6 s. Determine the height to which the ball rises before it reaches its peak. (Hint: the time to rise to the max height is one-half the total hang-time.) Solution Hang time = Total time required for upward plus […]

## Solution to problems – class 9 – Set 1 Q 21

Problem Statement A feather is dropped on the moon from a height of 10 meters. The acceleration of gravity on the moon is one sixth of that on the earth. Determine the time for the feather to fall to the surface of the moon. Solution Acceleration of gravity on the moon = 10/6 m/s2 = […]

## Physics questions and answers for class 9 cbse icse

Physics questions and answers for class 9 cbse icse – selected numericals and fundamental questions are being published under this super set. Students of Upper classes will also get benefitted if they try these. Solutions will also be provided. Here is the first set. More will come. visit us.. Assignments 1.) A ball is thrown […]

## Solution of Physics Numericals for class 9 (set 1 Q11)

Problem Statement A force acts for 10 s on a stationary body of mass 100 kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate (i) the velocity acquired by the body, (ii) the acceleration produced by the force, and (iii) the […]

## Velocity time graph – comprehensive Guide

The velocity-time graph is defined as a graphical representation of the velocity of a body in motion with respect to time. Generally, velocity is assigned to the y-axis, and time is pointed on the x-axis. This graph type is also written as a v-t graph or velocity-time graph. The diagram below depicts a few velocity-time […]

## Contact Forces between blocks – Application of Newton’s laws

Application of newton’s laws: Newton’s laws of motion give us concepts of force (first law), measurement of force with its equation (second law), and the reaction of force (3rd law). Today we will discuss an interesting topic of mechanics – the application of Newton’s laws. It will cover a few interesting applications of Newton’s Laws […]

## Physics problems – Solutions of selected numericals(set 1)

Physics Problem set with Solution Some of the posts in this blog include sample physics problem sets along with the post content. Readers can always try those. We have decided to publish the solutions to selected problems from different sets/posts, as we have done in this post. Physics Problem Q set source: (based on the […]

## 79 Challenging Physics Problems and Questions-Physics Question Bank

Here we are publishing a large number of physics problems and questions, with selective hints as well. These numerical problems and questions are distributed among 7 sets of Questions for you. The first set (Set number 1) is being published on this post body itself and the rest of the sets (6 more) are being embedded […]

## 2 Challenging Sets of Physics problems and Questions to test your preparation

In today’s post we are publishing 2 sets of Physics Problems and Question papers for high school students and adult physics lovers. The numerical problems will test the understanding of the topics or chapters involved while the descriptive questions are going to test the theoretical background of the readers. We invite the readers to solve […]

## Physics Numerical Problems and Question Sets

Physics Numerical Problems & Q sets This physicsteacher blog publishes sets of physics numerical problems. We are in a process to publish many such physics problem sets here in this blog itself. And on top of this, we are going to write how to solve those problems as well with hints, solutions and answers. These […]

Scroll to top
error: physicsTeacher.in