Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together.

What is the speed of the trucks after the collision?

A

v/4

B

v/2

C

v

D

5v/4

A person is standing on a balance with both feet. The reading of the balance is 200N. If he lifts a foot, what will the balance reading be?

What organ absorbs excess water from undigested food prior to its release from the body as a solid waste

Which of these is not a reasonable fitness goal? A. I want to exercise for 3 hours every day. B. I want to exercise for 30 minutes, five days a week. C. I want to be able to do 50 sit-ups in a row by next month. D.

A gnat takes off from one end of a pencil and flies around erratically for 18.6 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 7.15 meters, and the pencil is 6.

Box A is pulled 2 meters when a 3-newton force is applied to it. Box B is pulled 3 meters when a 2-newton force is applied to it. How does the work done on the two boxes compare? OA) More work was done on box A. OB) More work was done on box B.

Where did the asteroids in the asteroid belt come from?

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False