Question

Q1) A car accelerates from rest, for 5.0 seconds at a rate of 3.00 m/s2. How far does the car travel while

accelerating?

A) 15 m

B) 226 m

C) 75.0 m

D) 37.5 m

Q2) A 918 kg automobile is pushed along a level road by four students who apply a total forward force of

500 N. Neglecting friction, the acceleration of the automobile is

A) 0.055m/s2 B) 0.54 m/s2 C) 1.8 m/s2 D) 9.8 m/s2

3. An isotope of Carbon is Carbon-14. A neutral Carbon-14 atom has:

A) 6 protons, 8 neutrons, 6 electrons

B) 6 protons, 6 neutrons, 6 electrons

C) 6 protons, 8 neutrons, 8 electrons

D) 8 protons, 6 neutrons, 6 electrons

4. An 85 kilogram astronaut is wearing a 125 kilogram space suit. The astronaut is standing on the moon,

where gravity has 1/6 the acceleration of that on earth which is 9.8 m/s2. What is the total weight of

the astronaut with their space suit, on the moon?

A) 23.7 N

B) 142 N

C) 343 N

D) 2,060 N

5.	An inelastic collision is one in which: A) momentum is not conserved but kinetic energy is conserved B) total mass is not conserved but momentum is conserved C) neither kinetic energy nor momentum is conserved D) momentum is conserved but kinetic energy is not conserved

Answer 1

s=ut tl2ft² u= initial relocity f acceleration ,t= time 137.5 m (0) s= Y2x3x(5)² 1 F =ma F = force m - mass as acceleration 550 918 1 10.54 mis² (3) 3 14 GC (A) - Electron = 6 proton = 6 Neutron =14-6=8 - 210 kg . tatal mass = (85 85 +125 = 343 N (ع) Weight 2107918x76 momentum 5 > In inelastic C Collision mly kinetic energy kinetic energro there are 2 Consenued not some loss of option so Connect D