Physics
posted by Shazra .
A force was applied on a mass of 2kg moving at velocity of 5m/s. If the velocity changed to 20m/s in 4s find the change in momentum and the force

Change in momentum = 2.0 kg*(20  5) m/s
= 30 kg*m/s
Force * Time = Change in momentum
Force = (30 kg*m/s)/(4.0 s)
= 7.5 Newtons
Respond to this Question
Similar Questions

Physics
The velocity of a 629kg auto is changed from 10.0 m/s to 44.0 m/s in 70.0 s by an external, constant force. (a) What is the resulting change in momentum of the car? 
physics
a snowmobile has a mass of 2.5*10^2 kg. A constant force acts upon it for 60 seconds. The snowmobile's inital velocity is 6 m/s and its final velocity is 28 m/s. a) find its change in momentum of the ball. b) what is the magnitude … 
Science (Force and motion)
Explain how acceleration can be slowing down. Calculate the impact force of a 50 kg object travelling at 100km/hr. (Momentum = mass x velocity) Calculate the momentum of a tennis ball of 50 g moving at a velocity of 25m/s. 
Physics
a foam boulder has a mass of 2kg and a velocity of 20m/s. a stone boulder has the same velocity (20m/s) but a mass of 20kg. which of the two has more momentum? 
physics
calculate the momentum of an object if: a. its mass is 4kg and its velocity is 8m/s b. its mass is 500g and its velocity is 3m/s c. a force of 20N is applied to it for 6s and it moves from rest D. its mass is 2kg and it falls from … 
Physics ~IMPULSE~
a) A tennis racket a 450 N force on a 0.05 kg tennis ball over a 0.006 s time period. What is the impulse applied to the ball? 
Physics
John exerts constant force of 120 N for 10 s. on a stalled motorcycle. The final velocity is 8 m/s after the force was applied. If original velocity was zero, what is a)change of momentum b) the impulse produced c) magnitude of the … 
physics
Part 2: Complete the following math problems by using the Law of Momentum Conservation. Formulas: i. Momentum = (mass) * (velocity) ii. Impulse = (Applied force) * (time) and Impulse = Change in Momentum iii. Applied Force = (Change … 
s.e.international
a ball of mass 200gm travelling at 20m/s is hit back with a velocity of 30 m/s .if the force lasts for 0.1sec ,find force and change in momentum 
Physicd
A body of mass 2kg initially moving with 10m/s and a force is applied 10 N at an angle 53 degrees with the normal then find velocity and acceleration after 5 seconds