ppins' mass is 65 kg. What force is her umbrella expected to exert on her to...
1A) What is the acceleration of the sled given the following parameters: mass = 35. kg, friction is 30.N, force to pull on rope is 230 N, angle on rope is 40 degrees above ground. 1B) A ball rolls off a cliff with a horizontal velocity of 10 m/s. It hits the ground with a velocity of 30 m/s. Determine the vertical component of its velocity at the moment it hits the ground and the height of the cliff.
3) A mass of 5 kg is resting on a horizontal, frictionless surface. Force 1 is applied to it at 20 degrees below the horizontal in the -x direction, force 2 has a magnitude of 88 N and is applied in the +x direction , and force 3 has a magnitude of 25 N and is applied vertically downwards. When these forces are applied, the normal force acting on the mass is twice the amount of its weight. Also, when...
1. A woman has a mass of 63.0kg . A. What is her weight on earth? B. What is her mass on the moon, where g=1.62m/s2? C. What is her weight on the moon, where g=1.62m/s2? 2. A. How much force does an 72kg astronaut exert on his chair while sitting at rest on the launch pad? B. How much force does the astronaut exert on his chair while accelerating straight up at 14m/s2 ? 3. A. A 4000 kg...
Simone, a 47 kg gymnast, is performing the last tumbling pass of
her floor routine. The tumbling pass involves running as fast as
possible then jumping into the air to complete a double layout with
a twist (this exact maneuver, the double layout with a twist, is
not important, but a photo is provided on Canvas to show you what
this maneuver is). The instant before she jumps into the air, her
center of mass (COM) is 0.90 m above...
A 65 kg person jumps out a building to escape a fire into a net set up below. When she reaches ground level her speed is 17.3 m/s. If it takes 0.470 sec for her to reach zero velocity after coming in contact with the net What is the average force she experiences while in contact with the net? [Write answer to 3 sig. figs.]
Calculate (in N) the force a mother must exert to hold her 12.0 kg child in an elevator under the following condition: The elevator accelerates upward at 1.57 m/s^2m/s2 .
A tennis ball of mass 0.0631 kg is served. It strikes the ground with a velocity of 54.0 m/s (120 mi/h) at an angle of 22.0° below the horizontal. Just after the bounce it is moving at 53.0 m/s at an angle of 18.0° above the horizontal. If the interaction with the ground lasts 0.0630 s, in what angle does the average force exerted by the ground on the ball act?
what force does each of four legs on a uniform bed of mass 45 kg exert on the floor
A high jumper (mass=70 kg) is competing in an Olympic event. The height she was trying to clear was when her CoG was 2.05 m above the ground (CoG was 1 m above ground at takeoff). While making the jump, the jumper’s foot was in contact with the ground for 0.22s during the upward phase of the jump. a. How much change in potential energy must the jumper have to just clear the bar? (1 pt) b. What is the...
A parachutist whose mass is 65 kg drops from a helicopter hovering 1500 m above the ground and falls toward the ground under the influence of gravity. Assume that the force due to air resistance is proportional to the velocity of the parachutist, with the proportionality constant b 20 N-sec/m when the chute is closed and b2 90 N-sec/m when the chute is open. If the chute does not open until the velocity of the parachutist reaches 25 m/sec, after...