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Get college assignment help at uniessay writers Two objects attract each other gravitationally with a force of 2.9×10^-10 N when they are 0.33 m apart. Their total mass is 4.0 kg. Find their individual masses.

A 150- crate, starting from rest, is pulled across a floor

A 150- crate, starting from rest, is pulled across a floor with a constant horizontal force of 360 . For the first 11 the floor is frictionless, and for the next 11 the coefficient of friction is 0.31. What is the final speed of the crate?

“E14. A ball rolls off of a table with a horizontal

“E14. A ball rolls off of a table with a horizontal velocity of 5 m/s. If it takes 0.6 s for it to reach the floor: a. What is the vertical component of the ball’s velocity just before it hits the floor? b. What is the horizontal component of the ball’s velocity just before it hits the floor?” sp3. Two balls are rolled off a tabletop that is 0.8 m above the floor. Ball A has a horizontal velocity of 3 m/s and that of ball B is 5 m/s. a. Assuming g = 10 m/s2, how long does it take each ball to reach the floor after it rolls off the edge? b. How far does each ball travel horizontally before hitting the floor? c. If the two balls started rolling at the same time at a point 1.2 m behind the edge of the table, will they reach the floor at the same time? Explain. E 16. A projectile is fired at an angle such that the vertical component of its velocity and the horizontal component of its velocity are both equal to 30m/s. Using the approximate value of g=10m/s/s, how long does it take for the ball to reach its highest point? What horizontal distance does the ball travel in this time? e.15 a ball rolls off a platerform that is 5 meters above the ground the balls horizontal velocity as it leaves the platform is 6m/s a- how much time does it take for the ball to hit the ground? use g=10m/s2 b- how far from the base of the platform does the ball hit the ground?

point 36.0 m (about 39 yd) from the goal. As a

point 36.0 m (about 39 yd) from the goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 21.0 m/s at an angle of 46◦ to the horizontal. The acceleration of gravity is 9.81 m/s2 . a) To determine if the ball clears the cross- bar, what is its height with respect to the crossbar when it reaches the plane of the crossbar? Answer in units of m.

Question 5 0.83 points Save Two skaters that are initially at

Question 5 0.83 points Save Two skaters that are initially at rest push off from one another. One has a mass of 50 kg and moves with a speed of 4.0 m/s to the right after pushing off. What is the velocity of the other skater whose mass is 75 kg? 200 kg m/s. 4 m/s to the left. 2.67 m/s to the left. 2.67 m/s to the right.

Suppose you are 90 cm from a plane mirror. What area

Suppose you are 90 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 5.5 mm.

n the figure below, a charged particle moves into a region

n the figure below, a charged particle moves into a region of uniform magnetic field , goes through half a circle, and then exits that region. The particle is either a proton or an electron (you must decide which). It spends 190 ns in the region.

A race car has a mass of 705 kg. It starts

A race car has a mass of 705 kg. It starts from rest and travels 41.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

A child goes down a playground slide with an acceleration of

A child goes down a playground slide with an acceleration of 1.30 .Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 34.0 below the horizontal.

A woman on a 10-speed bicycle travels at 9 m/s relative

A woman on a 10-speed bicycle travels at 9 m/s relative to the ground as she passes a little boy on a tricycle going in the opposite direction. If the boy is traveling at 1 m/s relative to the ground, how fast does the boy appear to be moving relative to the woman? show your work.

A 3.0-{rm kg} block sits on top of a 5.0-{rm kg}

Get college assignment help at uniessay writers A 3.0-{rm kg} block sits on top of a 5.0-{rm kg} block which is on a horizontal surface. The 5.0-{rm kg} block is pulled to the right with a force vec F as shown in the figure . The coefficient of static friction between all surfaces is 0.61 and the kinetic coefficient is 0.37. What is the minimum value of F needed to move the two blocks?

A force of 5.3 N is needed to hold on to

A force of 5.3 N is needed to hold on to an umbrella in a strong wind. If the air molecules each have a mass of 4.7 × 10-26 kg, and each strikes the umbrella (without rebounding) with a speed of 2.0 m/s in the same direction, how many atoms strike the umbrella each second? Assume that the wind blows horizontally so that the gravity can be neglected. PLease provide step-by-step method.

A rocket is to be launched from deep space where there

A rocket is to be launched from deep space where there is no gravitational field. 81% of the initial mass of the rocket is fuel and this fuel is ejected with a relative velocity of 2300 m/s. Assuming that all of the fuel is used, find the final speed of the last portion of the ejected fuel relative to a stationary observer. Please provide step-by-step method

a soccer ball of diameter 31cm rolls without slipping at a

a soccer ball of diameter 31cm rolls without slipping at a linear speed of 2.8 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 18m?

A roller coaster descends 35 meters in its initial drop and

A roller coaster descends 35 meters in its initial drop and then rises 23 meters before going over the first hill. If a passenger at the top of the hill feels an apparent weight which is one-half of her normal weight, what is the radius of curvature of the first hill? Assume no frictional losses, and neglect the initial speed of the roller coaster.Please provide step-by-step method. The figure for this problem is in the attachment.

A person driving her car at 53 km/h approaches an intersection

A person driving her car at 53 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection (Fig. 2-29). Should she try to stop, or should she make a run for it? The intersection is 15 m wide. Her car’s maximum deceleration is -6.2 m/s2, whereas it can accelerate from 53 km/h to 70 km/h in 5.1 s. Ignore the length of her car and her reaction time. If she hits the brakes, how far will she travel before stopping? If she hits the gas instead, how far will she travel before the light turns red?

A baseball is thrown at an angle of 22◦ relative to

A baseball is thrown at an angle of 22◦ relative to the ground at a speed of 25.7 m/s. The ball is caught 46.7701 m from the thrower. The acceleration due to gravity is 9.81 m/s2 . How long is it in the air?

A roller coaster, shown in Fig. 6-38 (h1 = 50 m,

A roller coaster, shown in Fig. 6-38 (h1 = 50 m, h2 = 11 m, h3 = 27 m), is pulled up to point A where it and its screaming occupants are released from rest. Assuming no friction, calculate the speed at points B, C and D. point B

A steel wire strung between two supports is initially horizontal when

A steel wire strung between two supports is initially horizontal when there is no tension on it. When a 9.5 kg painting is hung on the wire, the wire makes a 25° angle to the horizontal, as shown. What is the diameter of the wire?

A jet of water squirts out horizontally from a hole near

A jet of water squirts out horizontally from a hole near the bottom of the tank in Figure P9.45. If the hole has a diameter of 3.10 mm, what is the height, h, of the water level in the tank? 1Your answer is incorrect. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. cm Figure P9.45

A soccer ball of diameter 32 cm rolls without slipping at

A soccer ball of diameter 32 cm rolls without slipping at a linear speed of 3.2 m/s. Through how many revolutions has the soccer ball turned as it moves a linear distance of 16 m?

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