Sucess (Physcis test thingy)

Pg 193 1-6

Jenny has a mass of 35.6kg and her skateboard has a mass of 1.3kg. What is the momentum of her and skateboard together is they are going 9.50 m/s (p=mxv)

(triangle) p= 3.89 kg x m/s

Hockey player makes slap shot, exerting a force of 30.0N on the puck for 0.16s, What impulse is given to the puck? (I=Fnet x (triangle) t

The impulse given to the puck is calculated by multiplying the net force exerted on it by the time duration of that force. In this case, the impulse is 4.8 N·s

Puck in problem 2 has mass 0f 0.115 kg and was at rest before the shot. what spped does it head towards the goal at? (p=m x v)

(triangle)p/m=v`The speed of the puck can be calculated by rearranging the momentum formula to v = p/m, where p is the impulse calculated previously. Thus, the puck heads towards the goal at a speed of approximately 41.74 m/s.

Force of 6 N acts on 3.00 kg object for 10 sec

a) what object change in momentum (I= Fnet x (triangle) p)

b) what in change in velocity (p=m x v)

a) = 60 m/s

b) v= 20 m/s

velocity of 600 kg auto is changed from 10 m/s to 44 m/s in 68 sec by an applied constant force.

a) what change in momentum does it produce (I=Fnet x (triangle) p)

b) what is magnitude of force (I=Fnet x (triangle) p)

a) 20400

b) 300 N

845 kg car accelerates from rest to 100 km/h in 0.90s

a) what is change in momentum of car p=m x v

b) what is average force exerted on car (triangle) p = m x (Vf - Vi)/ (triangle) t

a) 8.45 ×10^4

b) 9.4 × 10^4

Pg 194 Pg 16, 18-21,24

95 kg full back running 8.2m/s collides midair with a 128 kg defensive tackle moving in opposite direction both end with zero speed. what was fullback’s momentum before collison

m1 v1= m2 v2

7.8 × 10² kgx m/s

Before collision 25 kg object is moving at 12 m/s. find impulse that acted on the this object after the collision it moves at 8 m/s (m x (triangle) v=m(Vf-Vi)

-1.0 × 10² kg x m/s

2575kg van runs into back of 825 kg compact car at rest they move off together at 8.5 m/s find initial speed of the van.

m1 v1+0= (m1+ m2) v’

v’= 11m/s

15g bullet shot into a 5085g wooden block standing on a frictionless surface. The block with the bullet in it acquires a speed of a velocity of 1m/s calculate velocity of bullet before striking the block. m1 v1+0= (m1+ m2) v’

v1=3.4×10² m/s

A car with mass 1245 kg moving at 29 m/s strikes 2175 kg car at rest. if the two cars stick together with what speed to they move? m1 v1=(m1+m2) v’

10/10.6 m/s

Equation for Impulse

I=Fnet x Δt where I is impulse, Fnet is the net force, and Δt is the change in time. Δt

1.Momentum equation,

2. Collison after stick/first object move second at rest

3. Collison equation

4. Change in momentum equation

5. triangle P= mvf- mvi

1. is given by p = mv, where p represents momentum, m is mass, and v is velocity.

2. m1 x v1 (m1+m2)

3. m1 x v1 + m2 x v2= m1 x v1’+ m2 x v2’

4. pf-pi= (triangle) p

5. The change in momentum, represented as ( \triangle p ), is calculated as the difference between the final momentum ( mv_f ) and the initial momentum ( mv_i ) of an object.

two carts of mass 1.5 kg each are rolled towards each other. The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s. The carts stick together when they collide. Calculate their final speed

After the collision, their final speed is 0.5 m/s.

A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg, collides with a smaller box with a mass of 2 kg that is stationary. The boxes stick together. What is the velocity of the two combined masses after collision?

After the collision, the combined mass moves with a velocity of 8 m/s.

A 120 kg lineman moving at -2 m/s tackles an 80 kg fullback moving at +8 m/s. If the fullback's velocity after they collide is +2 m/s, what is the lineman's velocity?

2m/s

A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum

375 kg m/s

If the change of momentum of an object is 50kg m/s, we can say the impulse is equal to

50 kg m/s

If an air bag changes a 60 kg person's speed from 40.0 m/s to 0.0 m/s, what impulse must act on the person

2400 kg m/s

An object with 20kgm/s is stopped by a force of -20N, how long does it take to do this

1 second

A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass

74.4 kg

An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. The final velocity of both objects will be

0 m/s

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.

6 N S

A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s. What is the velocity of the truck?

5 m/s

Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:

2 m/s

While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?

8 m/s