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# C

• ### A block lies on a fixed frictionless plane at an angle of 24° find the acceleration of the block as it slides down the plane. ?

b) If the block starts from rest 8.1 m up the plane from its base, what will be the block’s speed when it reaches the bottom of the incline?

Physics1 week ago
• ### A 6kg block (A) is attached to a 7kg block (B) by a string, which is wrapped around a pulley. B is attached to a 4kg block (C) by a string.?

The tension in the string between blocks B and C is?

• ### A person has a reasonable chance of surviving an automobile crash if the deceleration is no more than 30 g's.?

Calculate the force on a(n) 61-kg person accelerating at this rate

What distance is traveled if brought to rest at this rate from 92 km/hr?

• ### college is 190km from your home. You drive the first 95km at 91km/h then you to slow down to 63 km/h for the remainder of the trip.?

What's the average speed?

• ### You drive the first 95 km at 91 km/h before heavy traffic forces you to slow down to 63 km/h for the remainder of the trip.?

Whats the average speed?

• ### A football punter punts a football straight up into the air with a speed of 16.8 m/s. ?

a) What is the maximum height of the ball?

b) How long is it in the air before it reaches the ground?

• ### rain A, traveling 93mph, 170 miles away from Train B, traveling 60mph. Both are headed towards each other?

How much time (in hours) passes before the two trains meet?

How far (in miles) does train A travel?

• ### a hot-air balloon is ascending vertically at 4.3 m/s. At 91 m above the ground you pull out your phone. you drop your phone from this height?

a) how long does it take for your phone to reach the ground?

b) With what speed does it hit the ground?

• ### During football practice, the punter is working on his hangtime and kicks the football straight up into the air with a speed of 15.8 m/s. ?

a) What is the maximum height of the ball?

b) How long is it in the air before it reaches the ground? (assume the ball is kicked from ground level)

• ### A ball is thrown UPWARD with an initial speed of 20 m/s from the top of an 80-m high cliff and free falls to the valley below.?

When thrown upward, the ball's speed upon reaching the ground is (greater than/ less than/ equal to) it was when it was thrown downward at 20 m/s.

Physics2 months ago
• ### A ball is thrown DOWNWARD with an initial speed of 20 m/s from the top of an 80-m high cliff and free falls to the valley below.?

When thrown downward, the ball's acceleration is (less than/ greater than/ equal to) as if it was dropped

• ### A ball is dropped from rest at the top of an 80-m high cliff and free falls to the valley below in approximately 4 seconds. ?

How long will it take for the ball to reach the point 40 m above the valley floor?

- less than 2 seconds

- more than 2 seconds

- 2 seconds

- not enough information

• ### You are driving at 24 m/s when you see a red light ahead. Your car decelerates at 3.48 m/s2 and it takes you 0.39 s to get the brakes on.?

Your total stopping distance is how many meters

Physics2 months ago
• ### A world class sprinter can reach a top speed (of about 12.5 m/s) in the first 18 m of a race.?

a) What is the average acceleration (in m/s2) of this sprinter?

b) How long (in s) does it take her to reach that speed?

Physics2 months ago
• ### Tori Bowie can reach a top speed (of about 10.83 m/s) in the first 28.2 m of a race. How long does it take her to reach that speed?

It takes her how many seconds to reach a speed of 10.83 m/s.

• ### A car skids to a stop with a deceleration of 4.1 m/s2. Due to the hard braking, the tires leave 51 m long skid marks on the pavement.?

a) Determine the speed of the car (in m/s) just before braking.

b) How much time is required for the car to stop?