1.Calculate the momentum of an object if:
(a)its mass is 4.0 kg and its velocity is 8.0 ms-1
(b)its mass is 500 kg and its velocity is 3.0 kms-1
(c)a force of 20 N is applied to it for 6.0 s and it moves from rest (d)its mass is 2.0 kg and it falls from rest for 10 s (assuming g = 10 ms-1 or 10 Nkg-1).

2.A car of 1200 kg is pushed along a level road by two men. If they use a force of 800 N and frictional forces acting against them are 560 N, calculate: (a)the work done by the men they push the car for 10 m (b)the momentum gained by the car if the men push for 10 s.

3.A railway truck traveling along level track at 9 ms-1 collides with, and becomes coupled to, a stationary truck. Find the velocity of the coupled trucks immediately after the collision if the stationary truck has a mass which is: (a)equal to the mass of the moving truck

(b)twice the mass of the moving truck.

4.Two planes of the same mass collide head-on and become tangled so that they move on together. If the engines of both were stopped at the moment of impact and the speeds of the planes at impact were 120 ms-1 and 200 ms-1, find the joint velocity immediately after collision.

5.Two boys of masses 45 kg and 60 kg sit facing one another on light frictionless trolleys holding the ends of a strong taut cord between them. The lighter boy tugs the cord and acquires a velocity of 2 ms-1. What is the initial velocity of the other boy?

6.To make a course correction, a spaceship fires 5 kg of fuel out of its rocket engines as hot gases moving at 10000 ms-1. If the mass of the spacecraft is 20000 kg, calculate its change of velocity. Assume that the mass of the spaceship remains constant.

...MOMENTUM QUESTIONS
1. Which has greater momentum: a train at rest or a moving skateboard? Since the train is not moving, it has zero momentum. The skateboard, as long as it has some speed, will have more momentum, since p = m*v. 2. What are the ways to increase impulse? Impulse depends on the magnitude of the applied external force and the time that the force acts on the system. By increasing either of those, impulse on a system will be...

...Change of momentum is related to the forces acting on the vehicle or the driver. Explain how we can increase the safety of the driver based on the above statement.
Momentum of an object can be defined as the product of the mass of the object and its velocity. The unit of momentum is kgms-1. Momentum is a vector quantity, and it has both magnitude and direction. Its direction is the same as the direction of the object’s velocity....

...STAGE 2 PHYSICS
Assessment Type 1: Investigation Folio
Practical Investigation 2: Momentum
Purpose:
To investigate the relationship between the laws of conservation of momentum and Newton’s Third Law and another variable of your choice for a 2D collision of two objects.
Materials:
Hover puck
Video Recorder
Tripod
Masking tape
Ruler
Tracker (Computer Program)
Method:
On a flat surface containing no
obstacles, prepare the...

...
Free Fall
Rachel Shea
Physics 131 Lab, QL
Hasbrouck 210
Sept. 21, 2014
Abstract
This experiment measures the study of motion by observing the force of gravity acting solely upon an object, and also measures reaction time. If an object is in free fall, the only force acting upon it is gravity. The object used in this experiment was a golf ball that provided some acceleration when dropped. A sensor positioned underneath a table recorded the golf ball’s pattern of motion,...

...What is momentum?
Momentum of a body is defined as the mass multiplied by the velocity of this object.
Momentum= m x v
Momentum and Newton’s second law of motion:
The resultant force is proportional to the change in momentum per a second.
We know that force = mass x acceleration. So F (mv-mu)/t
F m (v-u)/t = ma so F=kma
Momentum is a vector quantity:
Momentum has a...

...AP Physics Summer Assignment with
Dr. Crymes
Welcome to AP Physics B! It is a college level
physics course that is fun, interesting, and challenging
on a level you’ve not yet experienced. This assignment
will review all of the prerequisite knowledge expected of
you. There are 7 parts to this assignment. By taking the
time to review and understand all parts of this
assignment, you will help yourself acclimate to the rigor
and pacing of AP...

... The PSBB Millennium School Geruhambakkam Chennai
XII PhysicsWorksheet
Electric charges and field
1. 1. An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55x104 v/m. The density of oil is 1.26 gm/cc. Estimate the radius of the drop.[Ans:1.428x10-6m]
2. Two small spheres each of mass 10-6kg are suspended from a point by silk threads 50 cm long. They are equally charged and...

...Abstract:
The students investigated about freezing point depression and at what temperature the substance changes states. The students used the freezing point depression to find the molar mass of benzoic acid. First they heated lauric acid to determine the temperature that the freezing point of the solvent is and then compared the temperature to that of the lauric acid/ benzoic acid solution. They then took the change in temperature in order to determine the molality of the benzoic acid,...