A 2.5 kg ball strikes a wall with a velocity of 7.9 m/s to the left. The ball bounces off with a velocity of 6.7 m/s to the right. If the ball is in contact with the wall for 0.18 s, what is the constant force exerted on the ball by the wall? ___________________ N to the rig

=Two blocks are connected by a light string that passes over a frictionless pulley as shown. The block of mass m₁ = 0.95 kg lies on a horizontal surface and is connected to a spring of force constant 30 N/m. The system is released from rest when the spring is unstretched. The hanging block of mass m₂ 0.5 kg falls a distance of 0.10 m before coming to rest. Calculate the coefficient of kinetic friction between the mass m, and the horizontal surface. A. 0.43 B. 0.37 C. 0.32 D. 0.28 = Reference my

Two blocks are in contact on a frictionless horizontal surface. The blocks are accelerated by a single horizontal force applied to the block m1. Where F = 150.0N , m7= 18 kg, and m2= 12 kg. The contact force of block 1 on block 2 is F m1 m2 О 300 N O 60 N O 120 N O 90 N

View Policies Current Attempt in Progress The velocity of a 6 kg particle is given by = (6t î+ 2t² ĵ) m/s, with time t in seconds. At the instant the net force on the particle has a magnitude of 38 N, what are the direction (relative to the positive direction of the x axis) of (a) the net force and (b) the particle's direction of travel? (a) Number Units (b) Number Units

Current Attempt in Progress A 54.0-kg person, standing on a diving board, dives straight down into the water. Just before striking the water, her speed is 4.75 m/s. At a time of 1.77 s after entering the water, her speed is reduced to 1.34 m/s. What is the magnitude of the average net force that acts on her when she is in the water? Vo Number i Units

**38. A 4-kg toy jet sled is accelerated forward from rest by escaping CO2 from the jet engine After the sled has gone 10 m, the engine shuts off, leaving the sled going 10 m/s. The coefficient of friction between the sled and the snow is 0.2. How much force did the jet produce? How far will the sled slide after the jet shuts off?

The figure shows a graph of E102 Part 1. The mass of the object is 0.696 kg. Which of the following is correct? Force (N) 1.0 0.80 0.60 0.40 0.20 0.0 0.0 1.0 است 2.0 3.0 4.0 Time (s) 5.0 6.0 7.0 8.0 The kinetic friction is 0.80 N and the starting friction is 0.52 N. The coefficient of static friction is 0.076. The coefficient of kinetic friction is 0.117. The kinetic friction is 0.52 N and the starting friction is 0.80 N.

Const A loaded tractor-trailer with a total mass of 4100 kg traveling at 3.2 km/h hits a loading dock and comes to a stop in 0.58 s Part A What is the magnitude of the average force exerted on the truck by the dock? Express your answer using two significant figures. nνα ΑΣφ- Submit Request Answer Provide Feedback

After falling from rest from a height of 31 m, a 0.40-kg ball rebounds upward, reaching a height of 21 m. If the contact between ball and ground lasted 2.3 ms, what average force was exerted on the ball? (Enter the magnitude.) N