Question

Asked Oct 21, 2019

15 views

A cannon ball is launched at 45 m/sec, at 37 degrees, from a platform that is 30 meters above the ground.

Use energy conservation method to calculate the speed of the ball when it hits the earth.

Step 1

Given:

Initial speed of canon ball, u = 45 m/s

Height of the platform from the ground, H = 30 m

Acceleration due to gravity, g = 9.8

Let the speed of the ball be v m/s when it hit the ground

Step 2

From the conservatio...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: 5 and 6. Thanks.

A: 5.Given vector

Q: A 3 kg cart on a frictionless horizontal plane is connected with an ideal string and an ideal pulley...

A: GivenMass of the hanging mass m1 = 4 kgMass of the cart m2 = 3 kg H =0.45 m

Q: In a head-on, inelastic collision, a 4,000-kg truck going 10 m/s east strikes a 1,000-kg car going 2...

A: (a) In an inelastic collision, the momentum is conserved. The law of conservation momentum states th...

Q: What is the minimum work needed to push a 800 kg car 930 m up along a 7.5 ∘ incline? A) Ignore frict...

A: A) Work done is,

Q: A girl of mass throws a ball up against a wall. The ball strikes the wall horizontally and it bounc...

A: The momentum is the product of the mass and velocity of an object. The mass of the ball is a constan...

Q: A concrete slab is 10.0 cm thick and has an area of 6.00 m2. Electric heating coils are installed un...

A: Given,

Q: 3-a) A charge Q is uniformly distributed over the volume of a solid sphere (centered at the origin)o...

A: The charge density is given by,

Q: A block of mass m = 2.00 kg is attached to a spring of force constant k = 405 N/m as shown in the fi...

A: Given:Mass of the block = 2.00 kgForce constant = 405 N/mDistance travelled by the block = 4.95 cmCo...

Q: A car can decelerate at -3.70 m/s2 without skidding when coming to rest on a level road. What would ...

A: Given:Deceleration of the car = -3.70 m/s2Acceleration due to gravity = 9.8 m/s2