A machine qun fors 11 bullets/s, each of the eped, to each bullet x g. mass 16 *: 24 cmst, then foxce of recoil is C) 1o0 lyne (b) 2000 dyne (c) 4224 dy ne (C) (A) 4230 dyne
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- What is the force applied to a ball if the momentum increase by 1.91kgm/s every 3.67s?A ball struck by a bat experiences a change in momentum of 42 kg m/s . If the time of interaction is 0.29 s, what is the magnitude of the average force acting on the ball (in N) ?Two balls moving in opposite directions have velocities v1ix= 14ˍm/s and v2ix = -8.4ˍm/s . If their masses are m1 = 3.3ˍkg and m2 = 6.9ˍkg, respectively, and if their collision is perfectly elastic, then predict the velocity of each ball following the collision.
- A rocket has a total AV of 7,39 km/s with an exhaust velocity of 3.50 km/s, what is the ratio of the rocket's initial mass (full of fuel) to its final mass (empty)?Find the recoil velocity of a gun having mass equal to 5 kg, if a bullet of 25gm acquires the velocity of 500m/s after firing from the gun.A shell of mass 8.2 kg is fired from a gun of mass 1270 kg, with a horizontalvelocity of 427 m/s. Find the velocity of recoil of the gun and hence find theconstant retarding force required to bring it to rest in a distance of 0.46 m(neglect the momentum of the released gases and friction)
- When spiking a volleyball, a player changes the velocity of theball from 4.2 m>s to -24 m>s along a certain direction. If theimpulse delivered to the ball by the player is -9.3 kg # m>s, what isthe mass of the volleyball?A volleyball with mass = 0.350 kg has been struck with a velocity of -13.66 m/s, and was returned by the opponent with a velocity of 28.90 m/s. If the time of contact is 0.00230 s, how much is the average force applied by the opponent on the ball?A 75-kg running back moving north at 2.0 m/s experiences a southward impulse of 250 N s. What is the magnitude of the final momentum of the running back?
- Derive the equation Ft= ∆p where F= force (N), t= time (s) and ∆p is change in momentumA 5.0 kg ball is rolling north at 2.50 m/s when it collides with a 6.0 kg ball which isinitially at rest. Given that the collision is perfectly inelastic, calculate the final velocitiesof both balls.In Section 1.4, we considered the collision of a karate expert’s hand with a concrete block. Based on the graphs in Figure 1.31, the initial downward speed of the fist with mass 0.75 kg is about −13 m/s and the collision time is approximately 25 ms. Find the impulse and the average force exerted on the block by the fist during the collision.