A man has a mass of 80 kg on Earth. a. What is the man’s weight on Mars where the acceleration due to gravity is 3.7 m/s2 ? Show your answer in both Newtons and pounds. b. What is the man’s mass while on Mars? Explain your answer

A child of mass 43 kg stands on a scale inside an elevator. Select one or more: A. The scale would show his weight as 335.40 N when the elevator accelerates downward at 2 m/s2. B. The scale would show his weight as 507.4 N when the elevator accelerates upward at 2 m/s2. C. The scale would show his weight as 335.40 N when the elevator accelerates upward at 2 m/s2. D. The scale would show his weight as 335.40 N when the elevator decelerates upward at 2 m/s2. E. The scale would show his weight as 421.4 N when the elevator is stationary. F. The scale would show his weight as 335.4 N when the elevator decelerates upward at 2 m/s2. G. The scale would show his weight as 421.40 N when the elevator moves with a constant velocity of 2.5 m/s.

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A person is trying to lift a box off the floor. The box has a mass of 55kg and the person can lift with a force of300N.a. Can the person lift the box?b. Find the normal force acting on the box.

Starting from rest, a 150 kg body experiences a force of 100 newtons acting on it in a direction parallel to the positive x-axis and a force of 150 newtons acting at 55° with respect to the positive x-axis. a. What is the net force acting on the body?  Include direction. b. What is the acceleration of the body? c. What velocity does it reach after 5 seconds?

I am looking for help with number 2.

I watched a lot of Looney Toons when I was a kid, and liked that the Roadrunners legs would spin for a second or two before their claws caught traction. a. With a coefficient of kinetic friction 0.2 what acceleration will the roadrunner experience while their feet are sliding accross the ground? b. How far forward will the roadrunner drift in a half second, starting from rest under this acceleration? c. After catching traction the Roadrunner accelerates away, travelling 10 m to get offscreen in one fifth of a second. What was their coefficient of static friction?

Part d help please

7. A car of mass m, is speeding up on level ground with an acceleration as a function of time given by d(t) = a1 where az and t, are non-zero constants. The mass of the car stays the same (it is a constant). a. Write Newton's 2nd Law for a system that only includes the car. b. Integrate your Newton's 2nd Law equation with respect to time fromt = 0 to t = 2t1 to determine an expression that relates the impulse exerted on the car to the mass and acceleration of the car. c. Determine the magnitude of the impulse on the car from t = 0 to t = 2t1. Note: this is the vector sum of all the impulses or "net impulse" acting on the car during this time period.

Two ice skaters, Bobby and Frankie, stand facing each other on very slippery ice. Bobby has a mass of 85 kg and Frankie has a mass of 65 kg. Bobby pushes off Frankie with a force of 100 N. a.    Find the accelerations (in magnitude) of Bobby and Frankie.b.    Suppose the “push” lasts 0.50 s. How far does Bobby travel in that time? How about Frankie?