Physics Answers

A 25 kg object with 3.0 m/s velocity travelling to the right hits object B, which has a mass of 15 kg and 6.0 m/s velocity moving and travelling to the left. After collision, determine the velocity of object A if object B:

a. Remains travelling to the left for 0.30 m/s

b. Recoils to the right at 0.45 m/s, and

c. Remains together with object A.

Ball A with mass of 100 g moving in a constant velocity of 200 cm/s,hits ball B with a mass of 400 g which is at rest. As a result of the collision, Ball A bounced back at 120 cm/s. Determine the final velocity of ball B

A 200 kg cart is pushed slowly up an incline how much work does the pushing force do in moving the cart up to a platform. 1.5 m above the starting point if the distance along the incline to the platform is 7 m and a friction force of 150 N

A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 20° with a speed of 24.5 m/s. What is the minimum coefficient of static friction required for the car not to skid?

An 8 kg bowling ball is at rest and a 5 kg bowling ball rolls towards it. Upon collision, The heavier ball moves with a velocity of 3 m/s and a lighter ball stops moving. What is the velocity of the lighter ball before collision?

A 30 g marble rolls with a velocity of 2 m/s toward a 70 g marble at rest. The lighter marble (m1) stops moving as its hits the heavier marble (m2). This collision causes the heavier marble to move. What is the velocity of the heavier marble?

 A particle moving along the x axis . It’s position varies with time according to x(t)=-4t+2t^2

a) Find the average velocity between t=0s and t=2s

b) Find the average speed of the particle between t=0s and t=2s

What force is needed to pull one microscope slide over another at a speed of 1:00 cm/s, if there is a 0.500 my think layer of 20.0 water between them and the contact area is 8:00 cm²?

1) Define and explain polytropic process

2) Derive the equation for polytropic process

What is the potential energy of 0.75 kg box which is lifted from the ground to a height of 0.5 m m above a meter high table? Use grams = 10 m/s