Notifications
Clear all
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.
Force and Laws of Motion
1
Posts
2
Users
0
Likes
465
Views
0
02/11/2021 4:29 pm
Topic starter
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?
Answer
Add a comment
Add a comment
Topic Tags
1 Answer
0
02/11/2021 4:31 pm
Mass of first truck, m1 = 500 kg
Speed of first truck, u1 = 4 m/s
Mass of second truck, m2 = 1500 kg
Speed of second truck, u2 = 2 m/s
Combined mass of both trucks, m = 1500 + 500 = 2000 kg
Combined velocity v
Acc. to the law of conservation of momentum
m1u1 + m2u2 = mv
500 x 4 + 1500 x 2 = 2000 x v
v = \(\frac{2000 + 3000}{2000}\) = 2.5 m/s
Add a comment
Add a comment
Forum Jump:
Related Topics
-
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?
3 years ago
-
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?
3 years ago
-
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.
3 years ago
-
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?
3 years ago
-
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?
3 years ago
Forum Information
- 321 Forums
- 27.3 K Topics
- 53.8 K Posts
- 1 Online
- 12.4 K Members
Our newest member: Stripchat
Forum Icons:
Forum contains no unread posts
Forum contains unread posts
Topic Icons:
Not Replied
Replied
Active
Hot
Sticky
Unapproved
Solved
Private
Closed