VOTHER A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.530 m/s. The total mass of the sled, man, and rock is 93.0 kg. The mass of the rock is 0.320 kg and the man can throw it with a speed of 16.5 m/s. Both speeds are relative to the ground. Determine the speed of the sled (in m/s) if the man throws the rock forward (i.e., in the direction the sled is moving). m/s Determine the speed of the sled (in m/s) if the man throws the rock directly backward. m/s

A stuntman drives a car of mass 1125 kg east with a speed of 20 m/s.  a. If the car accelerates at a rate of –2 m/s 2 , how long will it take the car to go 50 m? b. The stuntman drives the car off an 80 m cliff while going 15 m/s. How long will it take the car to land? c. How far horizontally from the cliff will the car land?

Alice has a mass of 62.0 kg and Bob has a mass of 84.0 kg and they are initially standing at rest with respect to one another on a frictionless surface. They push against each other such that Alice moves at 0.04 m/s relative to her starting point. With what speed does Bob move away from his initial position? a. 0.03 m/s b. 0.09 m/s c. 1.21 m/s d. 32.2 m/s e. 1.6 m/s

Students in a physics class were given several objects and asked to explore the nature of objects falling. The students drop each object  from a height of 1.5 m. They use a timer to determine how long it takes  each object to hit the ground. One of the students forgets to record the  data for the time it took the samples of paper to fall. Their results are  presented in the table as shown.   Object  Mass (kg)  Time to Fall (s) balled-up a sheet of notebook paper 0.005  ? a flat sheet of notebook paper 0.005  ? physics book  5.0  0.55    Which answer is MOST LIKELY to approximate the results the students observed in their experiment?     Answer   A The balled up and flat sheets of paper both fell faster than the physics book because they have less mass.   B The balled up and flat sheets of paper both took longer to fall than the physics book because they have less mass.   C The balled up and flat sheets of paper both hit the ground at…

A net force is applied in the positive directions to an object moving in one dimension. The graph of the force is below. The mass the object is 2.00kg . If the initial velocity of the object is m -1.00- what is the velocity of the object after this force is applied? S 4 1 2 3 4 time (s) force (N)

A 4.95 * 105 -kg rocket is accelerating straight up. It's engines produce 1.4 * 107 N of thrust, and air resistance is 4.55 * 106N.Considering the variables below:m =4.95*105 -kg f = 1.4 * 107 N fr=4.55*106 N   What would be rockets acceleration, using a coordinates system where up is positive?

Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 4.5 m/s, and just after is 2.5 m/s. If the ball is in contact with the floor for 0.025 s, what is the magnitude of the average force applied by the floor on the ball? Choose A. 3.5 N B. 48 N C. 42 N D. 54 N

1. A 2.50-kilogram mud ball drops from rest at a height of 13.0 m. If the impact between the ball and the ground lasts 0.51 s, what is the magnitude of the average force exerted by the ball on the ground? f60 f60 sst ssfo ssf60

A frog with some sort of little monster on his back is swimming in a bathtub of split tomato soup. The frog's mass is m1 = 0.0280 kg, and the monster's mass is m2 = 0.0300 kg. The frog propels the monster and himself forward with a constant force of F = 0.440 N and accelerates at a constant rate of a = 2.65 m/s^2.  a) What is the resistive force of the split tomato soup on the frog? b) If the frog starts at rest at one side of the bathtub and swims across its length in t = 1.91 s, how long is the bathtub? c) How much work is done by the split tomato soup on the frog?

A tennis ball weighing 0.560 N moves along a trajectory as a function of time r = (10 m/s)t2i - (2 m/s)t3j at t=1s, it collides with a rock with a time duration of 3 ms, during the collision the net force on the ball is constant and equal to (- 320N)i+(100N)j . a. What are the x- and y-components of the impulse of the net force applied to the ball? b. What are the x- and y-components of the final velocity of the ball?